Finding the Fourth Proportional to 10,463.28, 15,680.69 and 5,776.31

Step by Step Solution

1. Step 1: Write the proportion equation
   10,463.28 : 15,680.69 = 5,776.31 : x
2. Step 2: Convert to fraction form
   10,463.28/15,680.69 = 5,776.31/x
3. Step 3: Cross multiply
   10,463.28x = 15,680.69 × 5,776.31
4. Step 4: Simplify right side
   10,463.28x = 90,576,558.44
5. Step 5: Solve for x
   x = 90,576,558.44/10,463.28
6. Step 6: Final answer
   x = 8,656.62