Finding the Fourth Proportional to 10,428.27, 14,397.71 and 9,307.29

Step by Step Solution

1. Step 1: Write the proportion equation
   10,428.27 : 14,397.71 = 9,307.29 : x
2. Step 2: Convert to fraction form
   10,428.27/14,397.71 = 9,307.29/x
3. Step 3: Cross multiply
   10,428.27x = 14,397.71 × 9,307.29
4. Step 4: Simplify right side
   10,428.27x = 134,003,662.31
5. Step 5: Solve for x
   x = 134,003,662.31/10,428.27
6. Step 6: Final answer
   x = 12,850.04