Finding the Fourth Proportional to 10,397.31, 15,553.89 and 8,039.31

Step by Step Solution

1. Step 1: Write the proportion equation
   10,397.31 : 15,553.89 = 8,039.31 : x
2. Step 2: Convert to fraction form
   10,397.31/15,553.89 = 8,039.31/x
3. Step 3: Cross multiply
   10,397.31x = 15,553.89 × 8,039.31
4. Step 4: Simplify right side
   10,397.31x = 125,042,543.42
5. Step 5: Solve for x
   x = 125,042,543.42/10,397.31
6. Step 6: Final answer
   x = 12,026.43