Finding the Fourth Proportional to 3,498.37, 5,247.38 and 865.86

Step by Step Solution

1. Step 1: Write the proportion equation
   3,498.37 : 5,247.38 = 865.86 : x
2. Step 2: Convert to fraction form
   3,498.37/5,247.38 = 865.86/x
3. Step 3: Cross multiply
   3,498.37x = 5,247.38 × 865.86
4. Step 4: Simplify right side
   3,498.37x = 4,543,496.45
5. Step 5: Solve for x
   x = 4,543,496.45/3,498.37
6. Step 6: Final answer
   x = 1,298.75