Finding the Fourth Proportional to 2,621.02, 3,931.59 and 865.46

Step by Step Solution

1. Step 1: Write the proportion equation
   2,621.02 : 3,931.59 = 865.46 : x
2. Step 2: Convert to fraction form
   2,621.02/3,931.59 = 865.46/x
3. Step 3: Cross multiply
   2,621.02x = 3,931.59 × 865.46
4. Step 4: Simplify right side
   2,621.02x = 3,402,633.88
5. Step 5: Solve for x
   x = 3,402,633.88/2,621.02
6. Step 6: Final answer
   x = 1,298.21