Finding the Fourth Proportional to 20,896.52, 31,531.12 and 20,086.52

Step by Step Solution

1. Step 1: Write the proportion equation
   20,896.52 : 31,531.12 = 20,086.52 : x
2. Step 2: Convert to fraction form
   20,896.52/31,531.12 = 20,086.52/x
3. Step 3: Cross multiply
   20,896.52x = 31,531.12 × 20,086.52
4. Step 4: Simplify right side
   20,896.52x = 633,350,472.50
5. Step 5: Solve for x
   x = 633,350,472.50/20,896.52
6. Step 6: Final answer
   x = 30,308.90