Finding the Fourth Proportional to 1,838.72, 2,759.16 and 865.52

Step by Step Solution

1. Step 1: Write the proportion equation
   1,838.72 : 2,759.16 = 865.52 : x
2. Step 2: Convert to fraction form
   1,838.72/2,759.16 = 865.52/x
3. Step 3: Cross multiply
   1,838.72x = 2,759.16 × 865.52
4. Step 4: Simplify right side
   1,838.72x = 2,388,108.16
5. Step 5: Solve for x
   x = 2,388,108.16/1,838.72
6. Step 6: Final answer
   x = 1,298.79