Finding the Fourth Proportional to 1,108.56, 1,663.18 and 492.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,108.56 : 1,663.18 = 492.42 : x
2. Step 2: Convert to fraction form
   1,108.56/1,663.18 = 492.42/x
3. Step 3: Cross multiply
   1,108.56x = 1,663.18 × 492.42
4. Step 4: Simplify right side
   1,108.56x = 818,983.10
5. Step 5: Solve for x
   x = 818,983.10/1,108.56
6. Step 6: Final answer
   x = 738.78