Finding the Fourth Proportional to 13,692.42, 18,895.50 and 7,724.07

Step by Step Solution

1. Step 1: Write the proportion equation
   13,692.42 : 18,895.50 = 7,724.07 : x
2. Step 2: Convert to fraction form
   13,692.42/18,895.50 = 7,724.07/x
3. Step 3: Cross multiply
   13,692.42x = 18,895.50 × 7,724.07
4. Step 4: Simplify right side
   13,692.42x = 145,950,164.69
5. Step 5: Solve for x
   x = 145,950,164.69/13,692.42
6. Step 6: Final answer
   x = 10,659.19