Finding the Fourth Proportional to 13,158.38, 18,158.56 and 7,569.38

Step by Step Solution

1. Step 1: Write the proportion equation
   13,158.38 : 18,158.56 = 7,569.38 : x
2. Step 2: Convert to fraction form
   13,158.38/18,158.56 = 7,569.38/x
3. Step 3: Cross multiply
   13,158.38x = 18,158.56 × 7,569.38
4. Step 4: Simplify right side
   13,158.38x = 137,448,931.18
5. Step 5: Solve for x
   x = 137,448,931.18/13,158.38
6. Step 6: Final answer
   x = 10,445.74