Finding the Fourth Proportional to 2,508.86, 3,761.90 and 864.05

Step by Step Solution

1. Step 1: Write the proportion equation
   2,508.86 : 3,761.90 = 864.05 : x
2. Step 2: Convert to fraction form
   2,508.86/3,761.90 = 864.05/x
3. Step 3: Cross multiply
   2,508.86x = 3,761.90 × 864.05
4. Step 4: Simplify right side
   2,508.86x = 3,250,450.89
5. Step 5: Solve for x
   x = 3,250,450.89/2,508.86
6. Step 6: Final answer
   x = 1,295.59