Finding the Fourth Proportional to 8,898.84, 12,280.61 and 5,760.50

Step by Step Solution

1. Step 1: Write the proportion equation
   8,898.84 : 12,280.61 = 5,760.50 : x
2. Step 2: Convert to fraction form
   8,898.84/12,280.61 = 5,760.50/x
3. Step 3: Cross multiply
   8,898.84x = 12,280.61 × 5,760.50
4. Step 4: Simplify right side
   8,898.84x = 70,742,363.70
5. Step 5: Solve for x
   x = 70,742,363.70/8,898.84
6. Step 6: Final answer
   x = 7,949.62