Finding the Third Proportional to 65,730.50 and 143,899.50

Step by Step Solution

1. Step 1: Write the proportion equation
   65,730.50 : 143,899.50 = 143,899.50 : x
2. Step 2: Convert to fraction form
   65,730.50/143,899.50 = 143,899.50/x
3. Step 3: Cross multiply
   65,730.50x = 143,899.50 × 143,899.50
4. Step 4: Simplify right side
   65,730.50x = 20,707,066,100.25
5. Step 5: Solve for x
   x = 20,707,066,100.25/65,730.50
6. Step 6: Final answer
   x = 315,029.80