Finding the Fourth Proportional to 13,333.60, 18,401.82 and 7,668.64

Step by Step Solution

1. Step 1: Write the proportion equation
   13,333.60 : 18,401.82 = 7,668.64 : x
2. Step 2: Convert to fraction form
   13,333.60/18,401.82 = 7,668.64/x
3. Step 3: Cross multiply
   13,333.60x = 18,401.82 × 7,668.64
4. Step 4: Simplify right side
   13,333.60x = 141,116,932.92
5. Step 5: Solve for x
   x = 141,116,932.92/13,333.60
6. Step 6: Final answer
   x = 10,583.56