Finding the Fourth Proportional to 20,732.31, 31,098.60 and 5,149.98

Step by Step Solution

1. Step 1: Write the proportion equation
   20,732.31 : 31,098.60 = 5,149.98 : x
2. Step 2: Convert to fraction form
   20,732.31/31,098.60 = 5,149.98/x
3. Step 3: Cross multiply
   20,732.31x = 31,098.60 × 5,149.98
4. Step 4: Simplify right side
   20,732.31x = 160,157,168.03
5. Step 5: Solve for x
   x = 160,157,168.03/20,732.31
6. Step 6: Final answer
   x = 7,725.00