Finding the Fourth Proportional to 1,109.66, 1,665.45 and 744.89

Step by Step Solution

1. Step 1: Write the proportion equation
   1,109.66 : 1,665.45 = 744.89 : x
2. Step 2: Convert to fraction form
   1,109.66/1,665.45 = 744.89/x
3. Step 3: Cross multiply
   1,109.66x = 1,665.45 × 744.89
4. Step 4: Simplify right side
   1,109.66x = 1,240,568.72
5. Step 5: Solve for x
   x = 1,240,568.72/1,109.66
6. Step 6: Final answer
   x = 1,117.98