Finding the Fourth Proportional to 2,557.78, 3,531.51 and 1,674.82

Step by Step Solution

1. Step 1: Write the proportion equation
   2,557.78 : 3,531.51 = 1,674.82 : x
2. Step 2: Convert to fraction form
   2,557.78/3,531.51 = 1,674.82/x
3. Step 3: Cross multiply
   2,557.78x = 3,531.51 × 1,674.82
4. Step 4: Simplify right side
   2,557.78x = 5,914,643.58
5. Step 5: Solve for x
   x = 5,914,643.58/2,557.78
6. Step 6: Final answer
   x = 2,312.41