Finding the Fourth Proportional to 13,231.72, 19,847.34 and 3,997.72

Step by Step Solution

1. Step 1: Write the proportion equation
   13,231.72 : 19,847.34 = 3,997.72 : x
2. Step 2: Convert to fraction form
   13,231.72/19,847.34 = 3,997.72/x
3. Step 3: Cross multiply
   13,231.72x = 19,847.34 × 3,997.72
4. Step 4: Simplify right side
   13,231.72x = 79,344,108.06
5. Step 5: Solve for x
   x = 79,344,108.06/13,231.72
6. Step 6: Final answer
   x = 5,996.51