Finding the Fourth Proportional to 2,393.78, 3,587.40 and 1,240.34

Step by Step Solution

1. Step 1: Write the proportion equation
   2,393.78 : 3,587.40 = 1,240.34 : x
2. Step 2: Convert to fraction form
   2,393.78/3,587.40 = 1,240.34/x
3. Step 3: Cross multiply
   2,393.78x = 3,587.40 × 1,240.34
4. Step 4: Simplify right side
   2,393.78x = 4,449,595.72
5. Step 5: Solve for x
   x = 4,449,595.72/2,393.78
6. Step 6: Final answer
   x = 1,858.82