Finding the Fourth Proportional to 13,328.52, 18,391.77 and 7,663.38

Step by Step Solution

1. Step 1: Write the proportion equation
   13,328.52 : 18,391.77 = 7,663.38 : x
2. Step 2: Convert to fraction form
   13,328.52/18,391.77 = 7,663.38/x
3. Step 3: Cross multiply
   13,328.52x = 18,391.77 × 7,663.38
4. Step 4: Simplify right side
   13,328.52x = 140,943,122.38
5. Step 5: Solve for x
   x = 140,943,122.38/13,328.52
6. Step 6: Final answer
   x = 10,574.55