Finding the Fourth Proportional to 12,760.38, 17,604.96 and 7,977.06

Step by Step Solution

1. Step 1: Write the proportion equation
   12,760.38 : 17,604.96 = 7,977.06 : x
2. Step 2: Convert to fraction form
   12,760.38/17,604.96 = 7,977.06/x
3. Step 3: Cross multiply
   12,760.38x = 17,604.96 × 7,977.06
4. Step 4: Simplify right side
   12,760.38x = 140,435,822.22
5. Step 5: Solve for x
   x = 140,435,822.22/12,760.38
6. Step 6: Final answer
   x = 11,005.61