Finding the Fourth Proportional to 10,439.76, 14,406.12 and 5,723.28

Step by Step Solution

1. Step 1: Write the proportion equation
   10,439.76 : 14,406.12 = 5,723.28 : x
2. Step 2: Convert to fraction form
   10,439.76/14,406.12 = 5,723.28/x
3. Step 3: Cross multiply
   10,439.76x = 14,406.12 × 5,723.28
4. Step 4: Simplify right side
   10,439.76x = 82,450,258.47
5. Step 5: Solve for x
   x = 82,450,258.47/10,439.76
6. Step 6: Final answer
   x = 7,897.72