Finding the Fourth Proportional to 12,799.30, 17,664.47 and 7,134.57

Step by Step Solution

1. Step 1: Write the proportion equation
   12,799.30 : 17,664.47 = 7,134.57 : x
2. Step 2: Convert to fraction form
   12,799.30/17,664.47 = 7,134.57/x
3. Step 3: Cross multiply
   12,799.30x = 17,664.47 × 7,134.57
4. Step 4: Simplify right side
   12,799.30x = 126,028,273.73
5. Step 5: Solve for x
   x = 126,028,273.73/12,799.30
6. Step 6: Final answer
   x = 9,846.50