Finding the Fourth Proportional to 12,747.78, 17,591.90 and 7,082.51

Step by Step Solution

1. Step 1: Write the proportion equation
   12,747.78 : 17,591.90 = 7,082.51 : x
2. Step 2: Convert to fraction form
   12,747.78/17,591.90 = 7,082.51/x
3. Step 3: Cross multiply
   12,747.78x = 17,591.90 × 7,082.51
4. Step 4: Simplify right side
   12,747.78x = 124,594,737.42
5. Step 5: Solve for x
   x = 124,594,737.42/12,747.78
6. Step 6: Final answer
   x = 9,773.84