Finding the Fourth Proportional to 1,082.18, 1,493.05 and 662.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,082.18 : 1,493.05 = 662.30 : x
2. Step 2: Convert to fraction form
   1,082.18/1,493.05 = 662.30/x
3. Step 3: Cross multiply
   1,082.18x = 1,493.05 × 662.30
4. Step 4: Simplify right side
   1,082.18x = 988,847.02
5. Step 5: Solve for x
   x = 988,847.02/1,082.18
6. Step 6: Final answer
   x = 913.75