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Finding the Fourth Proportional to 2,926.43, 4,388.95 and 978.63

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Solution

The fourth proportional to 2,926.43, 4,388.95 and 978.63 is: 1,467.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,926.43 : 4,388.95 = 978.63 : x
  2. Step 2: Convert to fraction form
    2,926.43/4,388.95 = 978.63/x
  3. Step 3: Cross multiply
    2,926.43x = 4,388.95 × 978.63
  4. Step 4: Simplify right side
    2,926.43x = 4,295,142.90
  5. Step 5: Solve for x
    x = 4,295,142.90/2,926.43
  6. Step 6: Final answer
    x = 1,467.71

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