Finding the Fourth Proportional to 1,094.57, 1,640.00 and 660.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,094.57 : 1,640.00 = 660.82 : x
2. Step 2: Convert to fraction form
   1,094.57/1,640.00 = 660.82/x
3. Step 3: Cross multiply
   1,094.57x = 1,640.00 × 660.82
4. Step 4: Simplify right side
   1,094.57x = 1,083,733.30
5. Step 5: Solve for x
   x = 1,083,733.30/1,094.57
6. Step 6: Final answer
   x = 990.10