Finding the Fourth Proportional to 914.43, 1,363.72 and 865.83

Step by Step Solution

1. Step 1: Write the proportion equation
   914.43 : 1,363.72 = 865.83 : x
2. Step 2: Convert to fraction form
   914.43/1,363.72 = 865.83/x
3. Step 3: Cross multiply
   914.43x = 1,363.72 × 865.83
4. Step 4: Simplify right side
   914.43x = 1,180,747.52
5. Step 5: Solve for x
   x = 1,180,747.52/914.43
6. Step 6: Final answer
   x = 1,291.24