Finding the Fourth Proportional to 13,326.50, 18,384.77 and 7,659.95

Step by Step Solution

1. Step 1: Write the proportion equation
   13,326.50 : 18,384.77 = 7,659.95 : x
2. Step 2: Convert to fraction form
   13,326.50/18,384.77 = 7,659.95/x
3. Step 3: Cross multiply
   13,326.50x = 18,384.77 × 7,659.95
4. Step 4: Simplify right side
   13,326.50x = 140,826,288.74
5. Step 5: Solve for x
   x = 140,826,288.74/13,326.50
6. Step 6: Final answer
   x = 10,567.39