Finding the Fourth Proportional to 2,500.89, 3,451.67 and 1,438.57

Step by Step Solution

1. Step 1: Write the proportion equation
   2,500.89 : 3,451.67 = 1,438.57 : x
2. Step 2: Convert to fraction form
   2,500.89/3,451.67 = 1,438.57/x
3. Step 3: Cross multiply
   2,500.89x = 3,451.67 × 1,438.57
4. Step 4: Simplify right side
   2,500.89x = 4,965,468.91
5. Step 5: Solve for x
   x = 4,965,468.91/2,500.89
6. Step 6: Final answer
   x = 1,985.48