Finding the Fourth Proportional to 17,209.48, 25,811.78 and 5,521.18

Step by Step Solution

1. Step 1: Write the proportion equation
   17,209.48 : 25,811.78 = 5,521.18 : x
2. Step 2: Convert to fraction form
   17,209.48/25,811.78 = 5,521.18/x
3. Step 3: Cross multiply
   17,209.48x = 25,811.78 × 5,521.18
4. Step 4: Simplify right side
   17,209.48x = 142,511,483.50
5. Step 5: Solve for x
   x = 142,511,483.50/17,209.48
6. Step 6: Final answer
   x = 8,280.99