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Finding the Fourth Proportional to 3,978.39, 5,967.68 and 1,056.69

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Solution

The fourth proportional to 3,978.39, 5,967.68 and 1,056.69 is: 1,585.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,978.39 : 5,967.68 = 1,056.69 : x
  2. Step 2: Convert to fraction form
    3,978.39/5,967.68 = 1,056.69/x
  3. Step 3: Cross multiply
    3,978.39x = 5,967.68 × 1,056.69
  4. Step 4: Simplify right side
    3,978.39x = 6,305,987.78
  5. Step 5: Solve for x
    x = 6,305,987.78/3,978.39
  6. Step 6: Final answer
    x = 1,585.06

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