Finding the Third Proportional to 339,402 and 706,963.50

Step by Step Solution

1. Step 1: Write the proportion equation
   339,402 : 706,963.50 = 706,963.50 : x
2. Step 2: Convert to fraction form
   339,402/706,963.50 = 706,963.50/x
3. Step 3: Cross multiply
   339,402x = 706,963.50 × 706,963.50
4. Step 4: Simplify right side
   339,402x = 499,797,390,332.25
5. Step 5: Solve for x
   x = 499,797,390,332.25/339,402
6. Step 6: Final answer
   x = 1,472,582.34