Finding the Fourth Proportional to 12,793.72, 17,658.10 and 8,077.08

Step by Step Solution

1. Step 1: Write the proportion equation
   12,793.72 : 17,658.10 = 8,077.08 : x
2. Step 2: Convert to fraction form
   12,793.72/17,658.10 = 8,077.08/x
3. Step 3: Cross multiply
   12,793.72x = 17,658.10 × 8,077.08
4. Step 4: Simplify right side
   12,793.72x = 142,625,886.35
5. Step 5: Solve for x
   x = 142,625,886.35/12,793.72
6. Step 6: Final answer
   x = 11,148.12