Finding the Fourth Proportional to 1,105.16, 1,658.70 and 740.39

Step by Step Solution

1. Step 1: Write the proportion equation
   1,105.16 : 1,658.70 = 740.39 : x
2. Step 2: Convert to fraction form
   1,105.16/1,658.70 = 740.39/x
3. Step 3: Cross multiply
   1,105.16x = 1,658.70 × 740.39
4. Step 4: Simplify right side
   1,105.16x = 1,228,076.60
5. Step 5: Solve for x
   x = 1,228,076.60/1,105.16
6. Step 6: Final answer
   x = 1,111.23