Finding the Fourth Proportional to 12,685.53, 17,505.77 and 7,020.27

Step by Step Solution

1. Step 1: Write the proportion equation
   12,685.53 : 17,505.77 = 7,020.27 : x
2. Step 2: Convert to fraction form
   12,685.53/17,505.77 = 7,020.27/x
3. Step 3: Cross multiply
   12,685.53x = 17,505.77 × 7,020.27
4. Step 4: Simplify right side
   12,685.53x = 122,895,196.86
5. Step 5: Solve for x
   x = 122,895,196.86/12,685.53
6. Step 6: Final answer
   x = 9,687.83