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Finding the Fourth Proportional to 402,959.26, 556,085.06 and 221,685

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Solution

The fourth proportional to 402,959.26, 556,085.06 and 221,685 is: 305,926.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,959.26 : 556,085.06 = 221,685 : x
  2. Step 2: Convert to fraction form
    402,959.26/556,085.06 = 221,685/x
  3. Step 3: Cross multiply
    402,959.26x = 556,085.06 × 221,685
  4. Step 4: Simplify right side
    402,959.26x = 123,275,716,526.10
  5. Step 5: Solve for x
    x = 123,275,716,526.10/402,959.26
  6. Step 6: Final answer
    x = 305,926.00

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