Finding the Fourth Proportional to 12,799.91, 17,664.17 and 7,135.25

Step by Step Solution

1. Step 1: Write the proportion equation
   12,799.91 : 17,664.17 = 7,135.25 : x
2. Step 2: Convert to fraction form
   12,799.91/17,664.17 = 7,135.25/x
3. Step 3: Cross multiply
   12,799.91x = 17,664.17 × 7,135.25
4. Step 4: Simplify right side
   12,799.91x = 126,038,145.00
5. Step 5: Solve for x
   x = 126,038,145.00/12,799.91
6. Step 6: Final answer
   x = 9,846.80