Finding the Fourth Proportional to 9,407.34, 12,981.69 and 5,428.62

Step by Step Solution

1. Step 1: Write the proportion equation
   9,407.34 : 12,981.69 = 5,428.62 : x
2. Step 2: Convert to fraction form
   9,407.34/12,981.69 = 5,428.62/x
3. Step 3: Cross multiply
   9,407.34x = 12,981.69 × 5,428.62
4. Step 4: Simplify right side
   9,407.34x = 70,472,661.97
5. Step 5: Solve for x
   x = 70,472,661.97/9,407.34
6. Step 6: Final answer
   x = 7,491.24