Finding the Fourth Proportional to 12,757.25, 17,605.29 and 7,091.78

Step by Step Solution

1. Step 1: Write the proportion equation
   12,757.25 : 17,605.29 = 7,091.78 : x
2. Step 2: Convert to fraction form
   12,757.25/17,605.29 = 7,091.78/x
3. Step 3: Cross multiply
   12,757.25x = 17,605.29 × 7,091.78
4. Step 4: Simplify right side
   12,757.25x = 124,852,755.49
5. Step 5: Solve for x
   x = 124,852,755.49/12,757.25
6. Step 6: Final answer
   x = 9,786.81