Finding the Fourth Proportional to 12,751.20, 17,596.42 and 7,085.90

Step by Step Solution

1. Step 1: Write the proportion equation
   12,751.20 : 17,596.42 = 7,085.90 : x
2. Step 2: Convert to fraction form
   12,751.20/17,596.42 = 7,085.90/x
3. Step 3: Cross multiply
   12,751.20x = 17,596.42 × 7,085.90
4. Step 4: Simplify right side
   12,751.20x = 124,686,498.75
5. Step 5: Solve for x
   x = 124,686,498.75/12,751.20
6. Step 6: Final answer
   x = 9,778.41