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Finding the Fourth Proportional to 19,321.74, 28,927.86 and 12,284.28

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Solution

The fourth proportional to 19,321.74, 28,927.86 and 12,284.28 is: 18,391.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,321.74 : 28,927.86 = 12,284.28 : x
  2. Step 2: Convert to fraction form
    19,321.74/28,927.86 = 12,284.28/x
  3. Step 3: Cross multiply
    19,321.74x = 28,927.86 × 12,284.28
  4. Step 4: Simplify right side
    19,321.74x = 355,357,932.04
  5. Step 5: Solve for x
    x = 355,357,932.04/19,321.74
  6. Step 6: Final answer
    x = 18,391.61

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