Finding the Fourth Proportional to 2,326.88, 3,490.37 and 865.74

Step by Step Solution

1. Step 1: Write the proportion equation
   2,326.88 : 3,490.37 = 865.74 : x
2. Step 2: Convert to fraction form
   2,326.88/3,490.37 = 865.74/x
3. Step 3: Cross multiply
   2,326.88x = 3,490.37 × 865.74
4. Step 4: Simplify right side
   2,326.88x = 3,021,742.86
5. Step 5: Solve for x
   x = 3,021,742.86/2,326.88
6. Step 6: Final answer
   x = 1,298.63