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Finding the Fourth Proportional to 3,978.02, 5,967.70 and 1,639.29

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Solution

The fourth proportional to 3,978.02, 5,967.70 and 1,639.29 is: 2,459.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,978.02 : 5,967.70 = 1,639.29 : x
  2. Step 2: Convert to fraction form
    3,978.02/5,967.70 = 1,639.29/x
  3. Step 3: Cross multiply
    3,978.02x = 5,967.70 × 1,639.29
  4. Step 4: Simplify right side
    3,978.02x = 9,782,761.09
  5. Step 5: Solve for x
    x = 9,782,761.09/3,978.02
  6. Step 6: Final answer
    x = 2,459.21

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