Finding the Fourth Proportional to 8,755.79, 12,082.64 and 5,171.91

Step by Step Solution

1. Step 1: Write the proportion equation
   8,755.79 : 12,082.64 = 5,171.91 : x
2. Step 2: Convert to fraction form
   8,755.79/12,082.64 = 5,171.91/x
3. Step 3: Cross multiply
   8,755.79x = 12,082.64 × 5,171.91
4. Step 4: Simplify right side
   8,755.79x = 62,490,300.78
5. Step 5: Solve for x
   x = 62,490,300.78/8,755.79
6. Step 6: Final answer
   x = 7,137.03