Finding the Fourth Proportional to 1,092.78, 1,640.82 and 1,076.58

Step by Step Solution

1. Step 1: Write the proportion equation
   1,092.78 : 1,640.82 = 1,076.58 : x
2. Step 2: Convert to fraction form
   1,092.78/1,640.82 = 1,076.58/x
3. Step 3: Cross multiply
   1,092.78x = 1,640.82 × 1,076.58
4. Step 4: Simplify right side
   1,092.78x = 1,766,474.00
5. Step 5: Solve for x
   x = 1,766,474.00/1,092.78
6. Step 6: Final answer
   x = 1,616.50