Finding the Fourth Proportional to 1,976.30, 2,726.82 and 1,258.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,976.30 : 2,726.82 = 1,258.78 : x
2. Step 2: Convert to fraction form
   1,976.30/2,726.82 = 1,258.78/x
3. Step 3: Cross multiply
   1,976.30x = 2,726.82 × 1,258.78
4. Step 4: Simplify right side
   1,976.30x = 3,432,466.48
5. Step 5: Solve for x
   x = 3,432,466.48/1,976.30
6. Step 6: Final answer
   x = 1,736.81