Finding the Fourth Proportional to 2,258.46, 3,388.50 and 1,391.76

Step by Step Solution

1. Step 1: Write the proportion equation
   2,258.46 : 3,388.50 = 1,391.76 : x
2. Step 2: Convert to fraction form
   2,258.46/3,388.50 = 1,391.76/x
3. Step 3: Cross multiply
   2,258.46x = 3,388.50 × 1,391.76
4. Step 4: Simplify right side
   2,258.46x = 4,715,978.76
5. Step 5: Solve for x
   x = 4,715,978.76/2,258.46
6. Step 6: Final answer
   x = 2,088.14