Finding the Fourth Proportional to 13,426.73, 18,531.12 and 7,760.49

Step by Step Solution

1. Step 1: Write the proportion equation
   13,426.73 : 18,531.12 = 7,760.49 : x
2. Step 2: Convert to fraction form
   13,426.73/18,531.12 = 7,760.49/x
3. Step 3: Cross multiply
   13,426.73x = 18,531.12 × 7,760.49
4. Step 4: Simplify right side
   13,426.73x = 143,810,571.45
5. Step 5: Solve for x
   x = 143,810,571.45/13,426.73
6. Step 6: Final answer
   x = 10,710.77