Finding the Fourth Proportional to 2,258.42, 3,386.88 and 1,380.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,258.42 : 3,386.88 = 1,380.78 : x
2. Step 2: Convert to fraction form
   2,258.42/3,386.88 = 1,380.78/x
3. Step 3: Cross multiply
   2,258.42x = 3,386.88 × 1,380.78
4. Step 4: Simplify right side
   2,258.42x = 4,676,536.17
5. Step 5: Solve for x
   x = 4,676,536.17/2,258.42
6. Step 6: Final answer
   x = 2,070.72