Finding the Fourth Proportional to 7,139.13, 10,710.68 and 2,981.10

Step by Step Solution

1. Step 1: Write the proportion equation
   7,139.13 : 10,710.68 = 2,981.10 : x
2. Step 2: Convert to fraction form
   7,139.13/10,710.68 = 2,981.10/x
3. Step 3: Cross multiply
   7,139.13x = 10,710.68 × 2,981.10
4. Step 4: Simplify right side
   7,139.13x = 31,929,608.15
5. Step 5: Solve for x
   x = 31,929,608.15/7,139.13
6. Step 6: Final answer
   x = 4,472.48