Finding the Third Proportional to 65,659 and 143,199

Step by Step Solution

1. Step 1: Write the proportion equation
   65,659 : 143,199 = 143,199 : x
2. Step 2: Convert to fraction form
   65,659/143,199 = 143,199/x
3. Step 3: Cross multiply
   65,659x = 143,199 × 143,199
4. Step 4: Simplify right side
   65,659x = 20,505,953,601
5. Step 5: Solve for x
   x = 20,505,953,601/65,659
6. Step 6: Final answer
   x = 312,309.87