Finding the Fourth Proportional to 31,052.52, 42,902.58 and 21,663

Step by Step Solution

1. Step 1: Write the proportion equation
   31,052.52 : 42,902.58 = 21,663 : x
2. Step 2: Convert to fraction form
   31,052.52/42,902.58 = 21,663/x
3. Step 3: Cross multiply
   31,052.52x = 42,902.58 × 21,663
4. Step 4: Simplify right side
   31,052.52x = 929,398,590.54
5. Step 5: Solve for x
   x = 929,398,590.54/31,052.52
6. Step 6: Final answer
   x = 29,929.89