Finding the Fourth Proportional to 2,095.86, 3,145.61 and 864.15

Step by Step Solution

1. Step 1: Write the proportion equation
   2,095.86 : 3,145.61 = 864.15 : x
2. Step 2: Convert to fraction form
   2,095.86/3,145.61 = 864.15/x
3. Step 3: Cross multiply
   2,095.86x = 3,145.61 × 864.15
4. Step 4: Simplify right side
   2,095.86x = 2,718,274.56
5. Step 5: Solve for x
   x = 2,718,274.56/2,095.86
6. Step 6: Final answer
   x = 1,296.97