Finding the Fourth Proportional to 10,257.05, 15,385.69 and 2,861.06

Step by Step Solution

1. Step 1: Write the proportion equation
   10,257.05 : 15,385.69 = 2,861.06 : x
2. Step 2: Convert to fraction form
   10,257.05/15,385.69 = 2,861.06/x
3. Step 3: Cross multiply
   10,257.05x = 15,385.69 × 2,861.06
4. Step 4: Simplify right side
   10,257.05x = 44,019,298.15
5. Step 5: Solve for x
   x = 44,019,298.15/10,257.05
6. Step 6: Final answer
   x = 4,291.62