Finding the Fourth Proportional to 8,898.81, 12,280.31 and 4,919.99

Step by Step Solution

1. Step 1: Write the proportion equation
   8,898.81 : 12,280.31 = 4,919.99 : x
2. Step 2: Convert to fraction form
   8,898.81/12,280.31 = 4,919.99/x
3. Step 3: Cross multiply
   8,898.81x = 12,280.31 × 4,919.99
4. Step 4: Simplify right side
   8,898.81x = 60,419,003.92
5. Step 5: Solve for x
   x = 60,419,003.92/8,898.81
6. Step 6: Final answer
   x = 6,789.56