Finding the Fourth Proportional to 2,500.71, 3,451.17 and 1,438.81

Step by Step Solution

1. Step 1: Write the proportion equation
   2,500.71 : 3,451.17 = 1,438.81 : x
2. Step 2: Convert to fraction form
   2,500.71/3,451.17 = 1,438.81/x
3. Step 3: Cross multiply
   2,500.71x = 3,451.17 × 1,438.81
4. Step 4: Simplify right side
   2,500.71x = 4,965,574.68
5. Step 5: Solve for x
   x = 4,965,574.68/2,500.71
6. Step 6: Final answer
   x = 1,985.67