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Finding the Fourth Proportional to 52,428.28, 78,641.94 and 21,256.12

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Solution

The fourth proportional to 52,428.28, 78,641.94 and 21,256.12 is: 31,883.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    52,428.28 : 78,641.94 = 21,256.12 : x
  2. Step 2: Convert to fraction form
    52,428.28/78,641.94 = 21,256.12/x
  3. Step 3: Cross multiply
    52,428.28x = 78,641.94 × 21,256.12
  4. Step 4: Simplify right side
    52,428.28x = 1,671,622,513.67
  5. Step 5: Solve for x
    x = 1,671,622,513.67/52,428.28
  6. Step 6: Final answer
    x = 31,883.99

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