Finding the Fourth Proportional to 2,557.53, 3,529.49 and 1,438.43

Step by Step Solution

1. Step 1: Write the proportion equation
   2,557.53 : 3,529.49 = 1,438.43 : x
2. Step 2: Convert to fraction form
   2,557.53/3,529.49 = 1,438.43/x
3. Step 3: Cross multiply
   2,557.53x = 3,529.49 × 1,438.43
4. Step 4: Simplify right side
   2,557.53x = 5,076,899.46
5. Step 5: Solve for x
   x = 5,076,899.46/2,557.53
6. Step 6: Final answer
   x = 1,985.08