Finding the Third Proportional to 65,920.50 and 145,287

Step by Step Solution

1. Step 1: Write the proportion equation
   65,920.50 : 145,287 = 145,287 : x
2. Step 2: Convert to fraction form
   65,920.50/145,287 = 145,287/x
3. Step 3: Cross multiply
   65,920.50x = 145,287 × 145,287
4. Step 4: Simplify right side
   65,920.50x = 21,108,312,369
5. Step 5: Solve for x
   x = 21,108,312,369/65,920.50
6. Step 6: Final answer
   x = 320,208.62