Finding the Fourth Proportional to 43,401.69, 65,101.32 and 13,821.30

Step by Step Solution

1. Step 1: Write the proportion equation
   43,401.69 : 65,101.32 = 13,821.30 : x
2. Step 2: Convert to fraction form
   43,401.69/65,101.32 = 13,821.30/x
3. Step 3: Cross multiply
   43,401.69x = 65,101.32 × 13,821.30
4. Step 4: Simplify right side
   43,401.69x = 899,784,874.12
5. Step 5: Solve for x
   x = 899,784,874.12/43,401.69
6. Step 6: Final answer
   x = 20,731.56