Finding the Fourth Proportional to 2,861.79, 4,280.82 and 2,686.83

Step by Step Solution

1. Step 1: Write the proportion equation
   2,861.79 : 4,280.82 = 2,686.83 : x
2. Step 2: Convert to fraction form
   2,861.79/4,280.82 = 2,686.83/x
3. Step 3: Cross multiply
   2,861.79x = 4,280.82 × 2,686.83
4. Step 4: Simplify right side
   2,861.79x = 11,501,835.60
5. Step 5: Solve for x
   x = 11,501,835.60/2,861.79
6. Step 6: Final answer
   x = 4,019.11