Finding the Fourth Proportional to 12,682.60, 17,499.18 and 7,965.16

Step by Step Solution

1. Step 1: Write the proportion equation
   12,682.60 : 17,499.18 = 7,965.16 : x
2. Step 2: Convert to fraction form
   12,682.60/17,499.18 = 7,965.16/x
3. Step 3: Cross multiply
   12,682.60x = 17,499.18 × 7,965.16
4. Step 4: Simplify right side
   12,682.60x = 139,383,768.57
5. Step 5: Solve for x
   x = 139,383,768.57/12,682.60
6. Step 6: Final answer
   x = 10,990.16