Finding the Fourth Proportional to 17,085.30, 25,635.15 and 8,315.70

Step by Step Solution

1. Step 1: Write the proportion equation
   17,085.30 : 25,635.15 = 8,315.70 : x
2. Step 2: Convert to fraction form
   17,085.30/25,635.15 = 8,315.70/x
3. Step 3: Cross multiply
   17,085.30x = 25,635.15 × 8,315.70
4. Step 4: Simplify right side
   17,085.30x = 213,174,216.86
5. Step 5: Solve for x
   x = 213,174,216.86/17,085.30
6. Step 6: Final answer
   x = 12,477.05