Finding the Third Proportional to 299,270 and 646,019.50

Step by Step Solution

1. Step 1: Write the proportion equation
   299,270 : 646,019.50 = 646,019.50 : x
2. Step 2: Convert to fraction form
   299,270/646,019.50 = 646,019.50/x
3. Step 3: Cross multiply
   299,270x = 646,019.50 × 646,019.50
4. Step 4: Simplify right side
   299,270x = 417,341,194,380.25
5. Step 5: Solve for x
   x = 417,341,194,380.25/299,270
6. Step 6: Final answer
   x = 1,394,530.67