Finding the Fourth Proportional to 9,407.06, 12,982.14 and 5,428.16

Step by Step Solution

1. Step 1: Write the proportion equation
   9,407.06 : 12,982.14 = 5,428.16 : x
2. Step 2: Convert to fraction form
   9,407.06/12,982.14 = 5,428.16/x
3. Step 3: Cross multiply
   9,407.06x = 12,982.14 × 5,428.16
4. Step 4: Simplify right side
   9,407.06x = 70,469,068.15
5. Step 5: Solve for x
   x = 70,469,068.15/9,407.06
6. Step 6: Final answer
   x = 7,491.09