Finding the Third Proportional to 272,319 and 422,626.50

Step by Step Solution

1. Step 1: Write the proportion equation
   272,319 : 422,626.50 = 422,626.50 : x
2. Step 2: Convert to fraction form
   272,319/422,626.50 = 422,626.50/x
3. Step 3: Cross multiply
   272,319x = 422,626.50 × 422,626.50
4. Step 4: Simplify right side
   272,319x = 178,613,158,502.25
5. Step 5: Solve for x
   x = 178,613,158,502.25/272,319
6. Step 6: Final answer
   x = 655,896.79