Finding the Fourth Proportional to 10,113.90, 15,155.48 and 7,158.38

Step by Step Solution

1. Step 1: Write the proportion equation
   10,113.90 : 15,155.48 = 7,158.38 : x
2. Step 2: Convert to fraction form
   10,113.90/15,155.48 = 7,158.38/x
3. Step 3: Cross multiply
   10,113.90x = 15,155.48 × 7,158.38
4. Step 4: Simplify right side
   10,113.90x = 108,488,573.35
5. Step 5: Solve for x
   x = 108,488,573.35/10,113.90
6. Step 6: Final answer
   x = 10,726.68