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Finding the Fourth Proportional to 18,890,280.40, 28,356,415.80 and 10,387,224.40

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Solution

The fourth proportional to 18,890,280.40, 28,356,415.80 and 10,387,224.40 is: 15,592,381.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,890,280.40 : 28,356,415.80 = 10,387,224.40 : x
  2. Step 2: Convert to fraction form
    18,890,280.40/28,356,415.80 = 10,387,224.40/x
  3. Step 3: Cross multiply
    18,890,280.40x = 28,356,415.80 × 10,387,224.40
  4. Step 4: Simplify right side
    18,890,280.40x = 294,544,454,094,305.56
  5. Step 5: Solve for x
    x = 294,544,454,094,305.56/18,890,280.40
  6. Step 6: Final answer
    x = 15,592,381.26

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