Finding the Third Proportional to 65,619 and 143,266.50

Step by Step Solution

1. Step 1: Write the proportion equation
   65,619 : 143,266.50 = 143,266.50 : x
2. Step 2: Convert to fraction form
   65,619/143,266.50 = 143,266.50/x
3. Step 3: Cross multiply
   65,619x = 143,266.50 × 143,266.50
4. Step 4: Simplify right side
   65,619x = 20,525,290,022.25
5. Step 5: Solve for x
   x = 20,525,290,022.25/65,619
6. Step 6: Final answer
   x = 312,794.92