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Finding the Fourth Proportional to 221,128.40, 331,692.60 and 54,916.40

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Solution

The fourth proportional to 221,128.40, 331,692.60 and 54,916.40 is: 82,374.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,128.40 : 331,692.60 = 54,916.40 : x
  2. Step 2: Convert to fraction form
    221,128.40/331,692.60 = 54,916.40/x
  3. Step 3: Cross multiply
    221,128.40x = 331,692.60 × 54,916.40
  4. Step 4: Simplify right side
    221,128.40x = 18,215,363,498.64
  5. Step 5: Solve for x
    x = 18,215,363,498.64/221,128.40
  6. Step 6: Final answer
    x = 82,374.60

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