Finding the Fourth Proportional to 10,999.27, 16,498.63 and 3,208.15

Step by Step Solution

1. Step 1: Write the proportion equation
   10,999.27 : 16,498.63 = 3,208.15 : x
2. Step 2: Convert to fraction form
   10,999.27/16,498.63 = 3,208.15/x
3. Step 3: Cross multiply
   10,999.27x = 16,498.63 × 3,208.15
4. Step 4: Simplify right side
   10,999.27x = 52,930,079.83
5. Step 5: Solve for x
   x = 52,930,079.83/10,999.27
6. Step 6: Final answer
   x = 4,812.14