Finding the Third Proportional to 65,720.50 and 142,513

Step by Step Solution

1. Step 1: Write the proportion equation
   65,720.50 : 142,513 = 142,513 : x
2. Step 2: Convert to fraction form
   65,720.50/142,513 = 142,513/x
3. Step 3: Cross multiply
   65,720.50x = 142,513 × 142,513
4. Step 4: Simplify right side
   65,720.50x = 20,309,955,169
5. Step 5: Solve for x
   x = 20,309,955,169/65,720.50
6. Step 6: Final answer
   x = 309,035.31