Finding the Fourth Proportional to 12,429.38, 17,146.76 and 7,390.78

Step by Step Solution

1. Step 1: Write the proportion equation
   12,429.38 : 17,146.76 = 7,390.78 : x
2. Step 2: Convert to fraction form
   12,429.38/17,146.76 = 7,390.78/x
3. Step 3: Cross multiply
   12,429.38x = 17,146.76 × 7,390.78
4. Step 4: Simplify right side
   12,429.38x = 126,727,851.05
5. Step 5: Solve for x
   x = 126,727,851.05/12,429.38
6. Step 6: Final answer
   x = 10,195.83