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Finding the Fourth Proportional to 57,140.80, 78,854.28 and 31,299.16

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Solution

The fourth proportional to 57,140.80, 78,854.28 and 31,299.16 is: 43,192.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,140.80 : 78,854.28 = 31,299.16 : x
  2. Step 2: Convert to fraction form
    57,140.80/78,854.28 = 31,299.16/x
  3. Step 3: Cross multiply
    57,140.80x = 78,854.28 × 31,299.16
  4. Step 4: Simplify right side
    57,140.80x = 2,468,072,726.40
  5. Step 5: Solve for x
    x = 2,468,072,726.40/57,140.80
  6. Step 6: Final answer
    x = 43,192.83

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