Finding the Fourth Proportional to 43,808.90, 65,706.15 and 12,221.12

Step by Step Solution

1. Step 1: Write the proportion equation
   43,808.90 : 65,706.15 = 12,221.12 : x
2. Step 2: Convert to fraction form
   43,808.90/65,706.15 = 12,221.12/x
3. Step 3: Cross multiply
   43,808.90x = 65,706.15 × 12,221.12
4. Step 4: Simplify right side
   43,808.90x = 803,002,743.89
5. Step 5: Solve for x
   x = 803,002,743.89/43,808.90
6. Step 6: Final answer
   x = 18,329.67