Finding the Fourth Proportional to 2,551.78, 3,522.53 and 1,557.41

Step by Step Solution

1. Step 1: Write the proportion equation
   2,551.78 : 3,522.53 = 1,557.41 : x
2. Step 2: Convert to fraction form
   2,551.78/3,522.53 = 1,557.41/x
3. Step 3: Cross multiply
   2,551.78x = 3,522.53 × 1,557.41
4. Step 4: Simplify right side
   2,551.78x = 5,486,036.15
5. Step 5: Solve for x
   x = 5,486,036.15/2,551.78
6. Step 6: Final answer
   x = 2,149.89