Finding the Fourth Proportional to 13,724.50, 18,940.62 and 7,756.03

Step by Step Solution

1. Step 1: Write the proportion equation
   13,724.50 : 18,940.62 = 7,756.03 : x
2. Step 2: Convert to fraction form
   13,724.50/18,940.62 = 7,756.03/x
3. Step 3: Cross multiply
   13,724.50x = 18,940.62 × 7,756.03
4. Step 4: Simplify right side
   13,724.50x = 146,904,016.94
5. Step 5: Solve for x
   x = 146,904,016.94/13,724.50
6. Step 6: Final answer
   x = 10,703.78