Finding the Fourth Proportional to 13,726.89, 18,942.06 and 7,759.12

Step by Step Solution

1. Step 1: Write the proportion equation
   13,726.89 : 18,942.06 = 7,759.12 : x
2. Step 2: Convert to fraction form
   13,726.89/18,942.06 = 7,759.12/x
3. Step 3: Cross multiply
   13,726.89x = 18,942.06 × 7,759.12
4. Step 4: Simplify right side
   13,726.89x = 146,973,669.23
5. Step 5: Solve for x
   x = 146,973,669.23/13,726.89
6. Step 6: Final answer
   x = 10,706.99