Finding the Fourth Proportional to 17,072.70, 25,623.45 and 8,315.10

Step by Step Solution

1. Step 1: Write the proportion equation
   17,072.70 : 25,623.45 = 8,315.10 : x
2. Step 2: Convert to fraction form
   17,072.70/25,623.45 = 8,315.10/x
3. Step 3: Cross multiply
   17,072.70x = 25,623.45 × 8,315.10
4. Step 4: Simplify right side
   17,072.70x = 213,061,549.10
5. Step 5: Solve for x
   x = 213,061,549.10/17,072.70
6. Step 6: Final answer
   x = 12,479.66