Finding the Fourth Proportional to 10,708.72, 16,022.76 and 7,428.16

Step by Step Solution

1. Step 1: Write the proportion equation
   10,708.72 : 16,022.76 = 7,428.16 : x
2. Step 2: Convert to fraction form
   10,708.72/16,022.76 = 7,428.16/x
3. Step 3: Cross multiply
   10,708.72x = 16,022.76 × 7,428.16
4. Step 4: Simplify right side
   10,708.72x = 119,019,624.92
5. Step 5: Solve for x
   x = 119,019,624.92/10,708.72
6. Step 6: Final answer
   x = 11,114.27