Finding the Fourth Proportional to 10,082.43, 15,126.72 and 5,155.53

Step by Step Solution

1. Step 1: Write the proportion equation
   10,082.43 : 15,126.72 = 5,155.53 : x
2. Step 2: Convert to fraction form
   10,082.43/15,126.72 = 5,155.53/x
3. Step 3: Cross multiply
   10,082.43x = 15,126.72 × 5,155.53
4. Step 4: Simplify right side
   10,082.43x = 77,986,182.70
5. Step 5: Solve for x
   x = 77,986,182.70/10,082.43
6. Step 6: Final answer
   x = 7,734.86