Finding the Third Proportional to 3,859.31 and 8,401.22

Step by Step Solution

1. Step 1: Write the proportion equation
   3,859.31 : 8,401.22 = 8,401.22 : x
2. Step 2: Convert to fraction form
   3,859.31/8,401.22 = 8,401.22/x
3. Step 3: Cross multiply
   3,859.31x = 8,401.22 × 8,401.22
4. Step 4: Simplify right side
   3,859.31x = 70,580,476.49
5. Step 5: Solve for x
   x = 70,580,476.49/3,859.31
6. Step 6: Final answer
   x = 18,288.35