Finding the Fourth Proportional to 16,810.74, 25,208.82 and 8,490.42

Step by Step Solution

1. Step 1: Write the proportion equation
   16,810.74 : 25,208.82 = 8,490.42 : x
2. Step 2: Convert to fraction form
   16,810.74/25,208.82 = 8,490.42/x
3. Step 3: Cross multiply
   16,810.74x = 25,208.82 × 8,490.42
4. Step 4: Simplify right side
   16,810.74x = 214,033,469.50
5. Step 5: Solve for x
   x = 214,033,469.50/16,810.74
6. Step 6: Final answer
   x = 12,731.95