Finding the Fourth Proportional to 12,200.80, 16,834.81 and 7,726.03

Step by Step Solution

1. Step 1: Write the proportion equation
   12,200.80 : 16,834.81 = 7,726.03 : x
2. Step 2: Convert to fraction form
   12,200.80/16,834.81 = 7,726.03/x
3. Step 3: Cross multiply
   12,200.80x = 16,834.81 × 7,726.03
4. Step 4: Simplify right side
   12,200.80x = 130,066,316.61
5. Step 5: Solve for x
   x = 130,066,316.61/12,200.80
6. Step 6: Final answer
   x = 10,660.47