Finding the Fourth Proportional to 8,902.56, 12,285.20 and 5,760.56

Step by Step Solution

1. Step 1: Write the proportion equation
   8,902.56 : 12,285.20 = 5,760.56 : x
2. Step 2: Convert to fraction form
   8,902.56/12,285.20 = 5,760.56/x
3. Step 3: Cross multiply
   8,902.56x = 12,285.20 × 5,760.56
4. Step 4: Simplify right side
   8,902.56x = 70,769,631.71
5. Step 5: Solve for x
   x = 70,769,631.71/8,902.56
6. Step 6: Final answer
   x = 7,949.36