Finding the Fourth Proportional to 10,728.31, 16,066.48 and 5,449.43

Step by Step Solution

1. Step 1: Write the proportion equation
   10,728.31 : 16,066.48 = 5,449.43 : x
2. Step 2: Convert to fraction form
   10,728.31/16,066.48 = 5,449.43/x
3. Step 3: Cross multiply
   10,728.31x = 16,066.48 × 5,449.43
4. Step 4: Simplify right side
   10,728.31x = 87,553,130.86
5. Step 5: Solve for x
   x = 87,553,130.86/10,728.31
6. Step 6: Final answer
   x = 8,160.95