Finding the Fourth Proportional to 2,551.78, 3,521.94 and 1,557.94

Step by Step Solution

1. Step 1: Write the proportion equation
   2,551.78 : 3,521.94 = 1,557.94 : x
2. Step 2: Convert to fraction form
   2,551.78/3,521.94 = 1,557.94/x
3. Step 3: Cross multiply
   2,551.78x = 3,521.94 × 1,557.94
4. Step 4: Simplify right side
   2,551.78x = 5,486,971.20
5. Step 5: Solve for x
   x = 5,486,971.20/2,551.78
6. Step 6: Final answer
   x = 2,150.25