Finding the Fourth Proportional to 12,429.16, 17,146.46 and 7,390.55

Step by Step Solution

1. Step 1: Write the proportion equation
   12,429.16 : 17,146.46 = 7,390.55 : x
2. Step 2: Convert to fraction form
   12,429.16/17,146.46 = 7,390.55/x
3. Step 3: Cross multiply
   12,429.16x = 17,146.46 × 7,390.55
4. Step 4: Simplify right side
   12,429.16x = 126,721,733.00
5. Step 5: Solve for x
   x = 126,721,733.00/12,429.16
6. Step 6: Final answer
   x = 10,195.52