Finding the Fourth Proportional to 3,139.96, 4,688.72 and 2,730.04

Step by Step Solution

1. Step 1: Write the proportion equation
   3,139.96 : 4,688.72 = 2,730.04 : x
2. Step 2: Convert to fraction form
   3,139.96/4,688.72 = 2,730.04/x
3. Step 3: Cross multiply
   3,139.96x = 4,688.72 × 2,730.04
4. Step 4: Simplify right side
   3,139.96x = 12,800,393.15
5. Step 5: Solve for x
   x = 12,800,393.15/3,139.96
6. Step 6: Final answer
   x = 4,076.61