Finding the Fourth Proportional to 13,327.13, 18,389.23 and 7,661.59

Step by Step Solution

1. Step 1: Write the proportion equation
   13,327.13 : 18,389.23 = 7,661.59 : x
2. Step 2: Convert to fraction form
   13,327.13/18,389.23 = 7,661.59/x
3. Step 3: Cross multiply
   13,327.13x = 18,389.23 × 7,661.59
4. Step 4: Simplify right side
   13,327.13x = 140,890,675.55
5. Step 5: Solve for x
   x = 140,890,675.55/13,327.13
6. Step 6: Final answer
   x = 10,571.72