Finding the Fourth Proportional to 31,044.52, 42,891.54 and 21,655

Step by Step Solution

1. Step 1: Write the proportion equation
   31,044.52 : 42,891.54 = 21,655 : x
2. Step 2: Convert to fraction form
   31,044.52/42,891.54 = 21,655/x
3. Step 3: Cross multiply
   31,044.52x = 42,891.54 × 21,655
4. Step 4: Simplify right side
   31,044.52x = 928,816,298.70
5. Step 5: Solve for x
   x = 928,816,298.70/31,044.52
6. Step 6: Final answer
   x = 29,918.85