Finding the Fourth Proportional to 12,789.88, 17,645.82 and 7,480.96

Step by Step Solution

1. Step 1: Write the proportion equation
   12,789.88 : 17,645.82 = 7,480.96 : x
2. Step 2: Convert to fraction form
   12,789.88/17,645.82 = 7,480.96/x
3. Step 3: Cross multiply
   12,789.88x = 17,645.82 × 7,480.96
4. Step 4: Simplify right side
   12,789.88x = 132,007,673.59
5. Step 5: Solve for x
   x = 132,007,673.59/12,789.88
6. Step 6: Final answer
   x = 10,321.26