Finding the Fourth Proportional to 1,092.50, 1,635.69 and 680.61

Step by Step Solution

1. Step 1: Write the proportion equation
   1,092.50 : 1,635.69 = 680.61 : x
2. Step 2: Convert to fraction form
   1,092.50/1,635.69 = 680.61/x
3. Step 3: Cross multiply
   1,092.50x = 1,635.69 × 680.61
4. Step 4: Simplify right side
   1,092.50x = 1,113,266.97
5. Step 5: Solve for x
   x = 1,113,266.97/1,092.50
6. Step 6: Final answer
   x = 1,019.01