Finding the Fourth Proportional to 10,604.98, 15,909.96 and 3,209.50

Step by Step Solution

1. Step 1: Write the proportion equation
   10,604.98 : 15,909.96 = 3,209.50 : x
2. Step 2: Convert to fraction form
   10,604.98/15,909.96 = 3,209.50/x
3. Step 3: Cross multiply
   10,604.98x = 15,909.96 × 3,209.50
4. Step 4: Simplify right side
   10,604.98x = 51,063,016.62
5. Step 5: Solve for x
   x = 51,063,016.62/10,604.98
6. Step 6: Final answer
   x = 4,815.00