Finding the Fourth Proportional to 7,139.72, 10,702.22 and 2,982.15

Step by Step Solution

1. Step 1: Write the proportion equation
   7,139.72 : 10,702.22 = 2,982.15 : x
2. Step 2: Convert to fraction form
   7,139.72/10,702.22 = 2,982.15/x
3. Step 3: Cross multiply
   7,139.72x = 10,702.22 × 2,982.15
4. Step 4: Simplify right side
   7,139.72x = 31,915,610.46
5. Step 5: Solve for x
   x = 31,915,610.46/7,139.72
6. Step 6: Final answer
   x = 4,470.15