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Finding the Fourth Proportional to 57,428.01, 86,140.94 and 31,299.03

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Solution

The fourth proportional to 57,428.01, 86,140.94 and 31,299.03 is: 46,947.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,428.01 : 86,140.94 = 31,299.03 : x
  2. Step 2: Convert to fraction form
    57,428.01/86,140.94 = 31,299.03/x
  3. Step 3: Cross multiply
    57,428.01x = 86,140.94 × 31,299.03
  4. Step 4: Simplify right side
    57,428.01x = 2,696,127,708.79
  5. Step 5: Solve for x
    x = 2,696,127,708.79/57,428.01
  6. Step 6: Final answer
    x = 46,947.96

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