Finding the Fourth Proportional to 13,605.33, 20,399.49 and 7,753.89

Step by Step Solution

1. Step 1: Write the proportion equation
   13,605.33 : 20,399.49 = 7,753.89 : x
2. Step 2: Convert to fraction form
   13,605.33/20,399.49 = 7,753.89/x
3. Step 3: Cross multiply
   13,605.33x = 20,399.49 × 7,753.89
4. Step 4: Simplify right side
   13,605.33x = 158,175,401.52
5. Step 5: Solve for x
   x = 158,175,401.52/13,605.33
6. Step 6: Final answer
   x = 11,625.99