Finding the Third Proportional to 307,701 and 646,501.50

Step by Step Solution

1. Step 1: Write the proportion equation
   307,701 : 646,501.50 = 646,501.50 : x
2. Step 2: Convert to fraction form
   307,701/646,501.50 = 646,501.50/x
3. Step 3: Cross multiply
   307,701x = 646,501.50 × 646,501.50
4. Step 4: Simplify right side
   307,701x = 417,964,189,502.25
5. Step 5: Solve for x
   x = 417,964,189,502.25/307,701
6. Step 6: Final answer
   x = 1,358,345.24