Finding the Fourth Proportional to 1,109.10, 1,662.06 and 799.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,109.10 : 1,662.06 = 799.50 : x
2. Step 2: Convert to fraction form
   1,109.10/1,662.06 = 799.50/x
3. Step 3: Cross multiply
   1,109.10x = 1,662.06 × 799.50
4. Step 4: Simplify right side
   1,109.10x = 1,328,816.97
5. Step 5: Solve for x
   x = 1,328,816.97/1,109.10
6. Step 6: Final answer
   x = 1,198.10