Finding the Fourth Proportional to 10,179.62, 15,338.78 and 8,371.25

Step by Step Solution

1. Step 1: Write the proportion equation
   10,179.62 : 15,338.78 = 8,371.25 : x
2. Step 2: Convert to fraction form
   10,179.62/15,338.78 = 8,371.25/x
3. Step 3: Cross multiply
   10,179.62x = 15,338.78 × 8,371.25
4. Step 4: Simplify right side
   10,179.62x = 128,404,706.31
5. Step 5: Solve for x
   x = 128,404,706.31/10,179.62
6. Step 6: Final answer
   x = 12,613.90