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Finding the Fourth Proportional to 13,393.78, 20,086.77 and 4,031.38

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Solution

The fourth proportional to 13,393.78, 20,086.77 and 4,031.38 is: 6,045.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,393.78 : 20,086.77 = 4,031.38 : x
  2. Step 2: Convert to fraction form
    13,393.78/20,086.77 = 4,031.38/x
  3. Step 3: Cross multiply
    13,393.78x = 20,086.77 × 4,031.38
  4. Step 4: Simplify right side
    13,393.78x = 80,977,402.84
  5. Step 5: Solve for x
    x = 80,977,402.84/13,393.78
  6. Step 6: Final answer
    x = 6,045.90

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