Finding the Fourth Proportional to 12,428.82, 17,146.17 and 7,390.29

Step by Step Solution

1. Step 1: Write the proportion equation
   12,428.82 : 17,146.17 = 7,390.29 : x
2. Step 2: Convert to fraction form
   12,428.82/17,146.17 = 7,390.29/x
3. Step 3: Cross multiply
   12,428.82x = 17,146.17 × 7,390.29
4. Step 4: Simplify right side
   12,428.82x = 126,715,168.69
5. Step 5: Solve for x
   x = 126,715,168.69/12,428.82
6. Step 6: Final answer
   x = 10,195.27