Finding the Fourth Proportional to 8,899.50, 12,280.83 and 4,920.38

Step by Step Solution

1. Step 1: Write the proportion equation
   8,899.50 : 12,280.83 = 4,920.38 : x
2. Step 2: Convert to fraction form
   8,899.50/12,280.83 = 4,920.38/x
3. Step 3: Cross multiply
   8,899.50x = 12,280.83 × 4,920.38
4. Step 4: Simplify right side
   8,899.50x = 60,426,350.32
5. Step 5: Solve for x
   x = 60,426,350.32/8,899.50
6. Step 6: Final answer
   x = 6,789.86