Finding the Fourth Proportional to 1,123.85, 1,686.03 and 662

Step by Step Solution

1. Step 1: Write the proportion equation
   1,123.85 : 1,686.03 = 662 : x
2. Step 2: Convert to fraction form
   1,123.85/1,686.03 = 662/x
3. Step 3: Cross multiply
   1,123.85x = 1,686.03 × 662
4. Step 4: Simplify right side
   1,123.85x = 1,116,151.86
5. Step 5: Solve for x
   x = 1,116,151.86/1,123.85
6. Step 6: Final answer
   x = 993.15