Finding the Fourth Proportional to 10,998.67, 16,498.59 and 3,208.09

Step by Step Solution

1. Step 1: Write the proportion equation
   10,998.67 : 16,498.59 = 3,208.09 : x
2. Step 2: Convert to fraction form
   10,998.67/16,498.59 = 3,208.09/x
3. Step 3: Cross multiply
   10,998.67x = 16,498.59 × 3,208.09
4. Step 4: Simplify right side
   10,998.67x = 52,928,961.59
5. Step 5: Solve for x
   x = 52,928,961.59/10,998.67
6. Step 6: Final answer
   x = 4,812.31