Finding the Fourth Proportional to 1,109.10, 1,662.30 and 492.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,109.10 : 1,662.30 = 492.15 : x
2. Step 2: Convert to fraction form
   1,109.10/1,662.30 = 492.15/x
3. Step 3: Cross multiply
   1,109.10x = 1,662.30 × 492.15
4. Step 4: Simplify right side
   1,109.10x = 818,100.95
5. Step 5: Solve for x
   x = 818,100.95/1,109.10
6. Step 6: Final answer
   x = 737.63