Finding the Third Proportional to 340,222.50 and 742,707

Step by Step Solution

1. Step 1: Write the proportion equation
   340,222.50 : 742,707 = 742,707 : x
2. Step 2: Convert to fraction form
   340,222.50/742,707 = 742,707/x
3. Step 3: Cross multiply
   340,222.50x = 742,707 × 742,707
4. Step 4: Simplify right side
   340,222.50x = 551,613,687,849
5. Step 5: Solve for x
   x = 551,613,687,849/340,222.50
6. Step 6: Final answer
   x = 1,621,332.18