Finding the Fourth Proportional to 1,013.43, 1,395.46 and 865.74

Step by Step Solution

1. Step 1: Write the proportion equation
   1,013.43 : 1,395.46 = 865.74 : x
2. Step 2: Convert to fraction form
   1,013.43/1,395.46 = 865.74/x
3. Step 3: Cross multiply
   1,013.43x = 1,395.46 × 865.74
4. Step 4: Simplify right side
   1,013.43x = 1,208,098.56
5. Step 5: Solve for x
   x = 1,208,098.56/1,013.43
6. Step 6: Final answer
   x = 1,192.09