Finding the Fourth Proportional to 12,796.89, 17,659.42 and 7,131.61

Step by Step Solution

1. Step 1: Write the proportion equation
   12,796.89 : 17,659.42 = 7,131.61 : x
2. Step 2: Convert to fraction form
   12,796.89/17,659.42 = 7,131.61/x
3. Step 3: Cross multiply
   12,796.89x = 17,659.42 × 7,131.61
4. Step 4: Simplify right side
   12,796.89x = 125,940,096.27
5. Step 5: Solve for x
   x = 125,940,096.27/12,796.89
6. Step 6: Final answer
   x = 9,841.46