Finding the Fourth Proportional to 13,328.83, 18,394.88 and 7,665.41

Step by Step Solution

1. Step 1: Write the proportion equation
   13,328.83 : 18,394.88 = 7,665.41 : x
2. Step 2: Convert to fraction form
   13,328.83/18,394.88 = 7,665.41/x
3. Step 3: Cross multiply
   13,328.83x = 18,394.88 × 7,665.41
4. Step 4: Simplify right side
   13,328.83x = 141,004,304.76
5. Step 5: Solve for x
   x = 141,004,304.76/13,328.83
6. Step 6: Final answer
   x = 10,578.89