Finding the Fourth Proportional to 8,020.72, 12,036.32 and 3,638.22

Step by Step Solution

1. Step 1: Write the proportion equation
   8,020.72 : 12,036.32 = 3,638.22 : x
2. Step 2: Convert to fraction form
   8,020.72/12,036.32 = 3,638.22/x
3. Step 3: Cross multiply
   8,020.72x = 12,036.32 × 3,638.22
4. Step 4: Simplify right side
   8,020.72x = 43,790,740.70
5. Step 5: Solve for x
   x = 43,790,740.70/8,020.72
6. Step 6: Final answer
   x = 5,459.70