Finding the Fourth Proportional to 13,162.80, 18,164.91 and 7,194.72

Step by Step Solution

1. Step 1: Write the proportion equation
   13,162.80 : 18,164.91 = 7,194.72 : x
2. Step 2: Convert to fraction form
   13,162.80/18,164.91 = 7,194.72/x
3. Step 3: Cross multiply
   13,162.80x = 18,164.91 × 7,194.72
4. Step 4: Simplify right side
   13,162.80x = 130,691,441.28
5. Step 5: Solve for x
   x = 130,691,441.28/13,162.80
6. Step 6: Final answer
   x = 9,928.85