Finding the Fourth Proportional to 10,399.52, 15,587.17 and 4,161.31

Step by Step Solution

1. Step 1: Write the proportion equation
   10,399.52 : 15,587.17 = 4,161.31 : x
2. Step 2: Convert to fraction form
   10,399.52/15,587.17 = 4,161.31/x
3. Step 3: Cross multiply
   10,399.52x = 15,587.17 × 4,161.31
4. Step 4: Simplify right side
   10,399.52x = 64,862,997.02
5. Step 5: Solve for x
   x = 64,862,997.02/10,399.52
6. Step 6: Final answer
   x = 6,237.11