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Finding the Fourth Proportional to 72,860.74, 109,318.65 and 28,519.18

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Solution

The fourth proportional to 72,860.74, 109,318.65 and 28,519.18 is: 42,789.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,860.74 : 109,318.65 = 28,519.18 : x
  2. Step 2: Convert to fraction form
    72,860.74/109,318.65 = 28,519.18/x
  3. Step 3: Cross multiply
    72,860.74x = 109,318.65 × 28,519.18
  4. Step 4: Simplify right side
    72,860.74x = 3,117,678,256.71
  5. Step 5: Solve for x
    x = 3,117,678,256.71/72,860.74
  6. Step 6: Final answer
    x = 42,789.55

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