Finding the Fourth Proportional to 2,839.96, 4,238.43 and 2,766.15

Step by Step Solution

1. Step 1: Write the proportion equation
   2,839.96 : 4,238.43 = 2,766.15 : x
2. Step 2: Convert to fraction form
   2,839.96/4,238.43 = 2,766.15/x
3. Step 3: Cross multiply
   2,839.96x = 4,238.43 × 2,766.15
4. Step 4: Simplify right side
   2,839.96x = 11,724,122.77
5. Step 5: Solve for x
   x = 11,724,122.77/2,839.96
6. Step 6: Final answer
   x = 4,128.27