Finding the Fourth Proportional to 8,920.89, 13,380.82 and 2,680.77

Step by Step Solution

1. Step 1: Write the proportion equation
   8,920.89 : 13,380.82 = 2,680.77 : x
2. Step 2: Convert to fraction form
   8,920.89/13,380.82 = 2,680.77/x
3. Step 3: Cross multiply
   8,920.89x = 13,380.82 × 2,680.77
4. Step 4: Simplify right side
   8,920.89x = 35,870,900.83
5. Step 5: Solve for x
   x = 35,870,900.83/8,920.89
6. Step 6: Final answer
   x = 4,021.00