Finding the Fourth Proportional to 12,832.42, 17,707.49 and 7,166.72

Step by Step Solution

1. Step 1: Write the proportion equation
   12,832.42 : 17,707.49 = 7,166.72 : x
2. Step 2: Convert to fraction form
   12,832.42/17,707.49 = 7,166.72/x
3. Step 3: Cross multiply
   12,832.42x = 17,707.49 × 7,166.72
4. Step 4: Simplify right side
   12,832.42x = 126,904,622.73
5. Step 5: Solve for x
   x = 126,904,622.73/12,832.42
6. Step 6: Final answer
   x = 9,889.38