Finding the Fourth Proportional to 13,231.42, 19,850.00 and 3,872.21

Step by Step Solution

1. Step 1: Write the proportion equation
   13,231.42 : 19,850.00 = 3,872.21 : x
2. Step 2: Convert to fraction form
   13,231.42/19,850.00 = 3,872.21/x
3. Step 3: Cross multiply
   13,231.42x = 19,850.00 × 3,872.21
4. Step 4: Simplify right side
   13,231.42x = 76,863,249.89
5. Step 5: Solve for x
   x = 76,863,249.89/13,231.42
6. Step 6: Final answer
   x = 5,809.15