Finding the Fourth Proportional to 10,311.89, 15,467.69 and 2,520.77

Step by Step Solution

1. Step 1: Write the proportion equation
   10,311.89 : 15,467.69 = 2,520.77 : x
2. Step 2: Convert to fraction form
   10,311.89/15,467.69 = 2,520.77/x
3. Step 3: Cross multiply
   10,311.89x = 15,467.69 × 2,520.77
4. Step 4: Simplify right side
   10,311.89x = 38,990,398.98
5. Step 5: Solve for x
   x = 38,990,398.98/10,311.89
6. Step 6: Final answer
   x = 3,781.11