Finding the Fourth Proportional to 10,702.72, 16,013.76 and 7,422.16

Step by Step Solution

1. Step 1: Write the proportion equation
   10,702.72 : 16,013.76 = 7,422.16 : x
2. Step 2: Convert to fraction form
   10,702.72/16,013.76 = 7,422.16/x
3. Step 3: Cross multiply
   10,702.72x = 16,013.76 × 7,422.16
4. Step 4: Simplify right side
   10,702.72x = 118,856,688.92
5. Step 5: Solve for x
   x = 118,856,688.92/10,702.72
6. Step 6: Final answer
   x = 11,105.28