Finding the Fourth Proportional to 2,639.25, 3,931.00 and 2,500.47

Step by Step Solution

1. Step 1: Write the proportion equation
   2,639.25 : 3,931.00 = 2,500.47 : x
2. Step 2: Convert to fraction form
   2,639.25/3,931.00 = 2,500.47/x
3. Step 3: Cross multiply
   2,639.25x = 3,931.00 × 2,500.47
4. Step 4: Simplify right side
   2,639.25x = 9,829,341.32
5. Step 5: Solve for x
   x = 9,829,341.32/2,639.25
6. Step 6: Final answer
   x = 3,724.29