Finding the Fourth Proportional to 12,789.80, 17,650.76 and 7,754.48

Step by Step Solution

1. Step 1: Write the proportion equation
   12,789.80 : 17,650.76 = 7,754.48 : x
2. Step 2: Convert to fraction form
   12,789.80/17,650.76 = 7,754.48/x
3. Step 3: Cross multiply
   12,789.80x = 17,650.76 × 7,754.48
4. Step 4: Simplify right side
   12,789.80x = 136,872,465.40
5. Step 5: Solve for x
   x = 136,872,465.40/12,789.80
6. Step 6: Final answer
   x = 10,701.69