Finding the Fourth Proportional to 1,243.43, 1,865.18 and 753.18

Step by Step Solution

1. Step 1: Write the proportion equation
   1,243.43 : 1,865.18 = 753.18 : x
2. Step 2: Convert to fraction form
   1,243.43/1,865.18 = 753.18/x
3. Step 3: Cross multiply
   1,243.43x = 1,865.18 × 753.18
4. Step 4: Simplify right side
   1,243.43x = 1,404,816.27
5. Step 5: Solve for x
   x = 1,404,816.27/1,243.43
6. Step 6: Final answer
   x = 1,129.79