Finding the Fourth Proportional to 12,761.55, 17,610.48 and 8,782.56

Step by Step Solution

1. Step 1: Write the proportion equation
   12,761.55 : 17,610.48 = 8,782.56 : x
2. Step 2: Convert to fraction form
   12,761.55/17,610.48 = 8,782.56/x
3. Step 3: Cross multiply
   12,761.55x = 17,610.48 × 8,782.56
4. Step 4: Simplify right side
   12,761.55x = 154,665,097.23
5. Step 5: Solve for x
   x = 154,665,097.23/12,761.55
6. Step 6: Final answer
   x = 12,119.62