Finding the Fourth Proportional to 10,082.72, 15,133.44 and 5,155.88

Step by Step Solution

1. Step 1: Write the proportion equation
   10,082.72 : 15,133.44 = 5,155.88 : x
2. Step 2: Convert to fraction form
   10,082.72/15,133.44 = 5,155.88/x
3. Step 3: Cross multiply
   10,082.72x = 15,133.44 × 5,155.88
4. Step 4: Simplify right side
   10,082.72x = 78,026,200.63
5. Step 5: Solve for x
   x = 78,026,200.63/10,082.72
6. Step 6: Final answer
   x = 7,738.61