Finding the Fourth Proportional to 10,280.27, 15,420.69 and 3,260.31

Step by Step Solution

1. Step 1: Write the proportion equation
   10,280.27 : 15,420.69 = 3,260.31 : x
2. Step 2: Convert to fraction form
   10,280.27/15,420.69 = 3,260.31/x
3. Step 3: Cross multiply
   10,280.27x = 15,420.69 × 3,260.31
4. Step 4: Simplify right side
   10,280.27x = 50,276,229.81
5. Step 5: Solve for x
   x = 50,276,229.81/10,280.27
6. Step 6: Final answer
   x = 4,890.56