Finding the Fourth Proportional to 12,872.07, 17,764.96 and 7,839.24

Step by Step Solution

1. Step 1: Write the proportion equation
   12,872.07 : 17,764.96 = 7,839.24 : x
2. Step 2: Convert to fraction form
   12,872.07/17,764.96 = 7,839.24/x
3. Step 3: Cross multiply
   12,872.07x = 17,764.96 × 7,839.24
4. Step 4: Simplify right side
   12,872.07x = 139,263,785.03
5. Step 5: Solve for x
   x = 139,263,785.03/12,872.07
6. Step 6: Final answer
   x = 10,819.07