Finding the Fourth Proportional to 1,123.58, 1,684.90 and 662.29

Step by Step Solution

1. Step 1: Write the proportion equation
   1,123.58 : 1,684.90 = 662.29 : x
2. Step 2: Convert to fraction form
   1,123.58/1,684.90 = 662.29/x
3. Step 3: Cross multiply
   1,123.58x = 1,684.90 × 662.29
4. Step 4: Simplify right side
   1,123.58x = 1,115,892.42
5. Step 5: Solve for x
   x = 1,115,892.42/1,123.58
6. Step 6: Final answer
   x = 993.16