Finding the Fourth Proportional to 13,200.29, 18,215.98 and 7,231.84

Step by Step Solution

1. Step 1: Write the proportion equation
   13,200.29 : 18,215.98 = 7,231.84 : x
2. Step 2: Convert to fraction form
   13,200.29/18,215.98 = 7,231.84/x
3. Step 3: Cross multiply
   13,200.29x = 18,215.98 × 7,231.84
4. Step 4: Simplify right side
   13,200.29x = 131,735,052.80
5. Step 5: Solve for x
   x = 131,735,052.80/13,200.29
6. Step 6: Final answer
   x = 9,979.71