Finding the Fourth Proportional to 13,333.59, 18,399.29 and 7,668.05

Step by Step Solution

1. Step 1: Write the proportion equation
   13,333.59 : 18,399.29 = 7,668.05 : x
2. Step 2: Convert to fraction form
   13,333.59/18,399.29 = 7,668.05/x
3. Step 3: Cross multiply
   13,333.59x = 18,399.29 × 7,668.05
4. Step 4: Simplify right side
   13,333.59x = 141,086,545.35
5. Step 5: Solve for x
   x = 141,086,545.35/13,333.59
6. Step 6: Final answer
   x = 10,581.29