Finding the Fourth Proportional to 1,766.98, 2,648.49 and 841.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,766.98 : 2,648.49 = 841.78 : x
2. Step 2: Convert to fraction form
   1,766.98/2,648.49 = 841.78/x
3. Step 3: Cross multiply
   1,766.98x = 2,648.49 × 841.78
4. Step 4: Simplify right side
   1,766.98x = 2,229,445.91
5. Step 5: Solve for x
   x = 2,229,445.91/1,766.98
6. Step 6: Final answer
   x = 1,261.73