Finding the Third Proportional to 65,642 and 143,992

Step by Step Solution

1. Step 1: Write the proportion equation
   65,642 : 143,992 = 143,992 : x
2. Step 2: Convert to fraction form
   65,642/143,992 = 143,992/x
3. Step 3: Cross multiply
   65,642x = 143,992 × 143,992
4. Step 4: Simplify right side
   65,642x = 20,733,696,064
5. Step 5: Solve for x
   x = 20,733,696,064/65,642
6. Step 6: Final answer
   x = 315,860.21