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Finding the Fourth Proportional to 55,442.76, 83,161.44 and 20,380.20

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Solution

The fourth proportional to 55,442.76, 83,161.44 and 20,380.20 is: 30,569.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,442.76 : 83,161.44 = 20,380.20 : x
  2. Step 2: Convert to fraction form
    55,442.76/83,161.44 = 20,380.20/x
  3. Step 3: Cross multiply
    55,442.76x = 83,161.44 × 20,380.20
  4. Step 4: Simplify right side
    55,442.76x = 1,694,846,779.49
  5. Step 5: Solve for x
    x = 1,694,846,779.49/55,442.76
  6. Step 6: Final answer
    x = 30,569.31

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