Finding the Fourth Proportional to 12,493.39, 17,250.81 and 7,720.27

Step by Step Solution

1. Step 1: Write the proportion equation
   12,493.39 : 17,250.81 = 7,720.27 : x
2. Step 2: Convert to fraction form
   12,493.39/17,250.81 = 7,720.27/x
3. Step 3: Cross multiply
   12,493.39x = 17,250.81 × 7,720.27
4. Step 4: Simplify right side
   12,493.39x = 133,180,910.92
5. Step 5: Solve for x
   x = 133,180,910.92/12,493.39
6. Step 6: Final answer
   x = 10,660.11