Finding the Fourth Proportional to 1,443.78, 2,166.18 and 750.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,443.78 : 2,166.18 = 750.42 : x
2. Step 2: Convert to fraction form
   1,443.78/2,166.18 = 750.42/x
3. Step 3: Cross multiply
   1,443.78x = 2,166.18 × 750.42
4. Step 4: Simplify right side
   1,443.78x = 1,625,544.80
5. Step 5: Solve for x
   x = 1,625,544.80/1,443.78
6. Step 6: Final answer
   x = 1,125.90