Finding the Fourth Proportional to 8,898.76, 12,280.32 and 4,919.89

Step by Step Solution

1. Step 1: Write the proportion equation
   8,898.76 : 12,280.32 = 4,919.89 : x
2. Step 2: Convert to fraction form
   8,898.76/12,280.32 = 4,919.89/x
3. Step 3: Cross multiply
   8,898.76x = 12,280.32 × 4,919.89
4. Step 4: Simplify right side
   8,898.76x = 60,417,823.56
5. Step 5: Solve for x
   x = 60,417,823.56/8,898.76
6. Step 6: Final answer
   x = 6,789.47