Finding the Third Proportional to 339,156 and 706,225.50

Step by Step Solution

1. Step 1: Write the proportion equation
   339,156 : 706,225.50 = 706,225.50 : x
2. Step 2: Convert to fraction form
   339,156/706,225.50 = 706,225.50/x
3. Step 3: Cross multiply
   339,156x = 706,225.50 × 706,225.50
4. Step 4: Simplify right side
   339,156x = 498,754,456,850.25
5. Step 5: Solve for x
   x = 498,754,456,850.25/339,156
6. Step 6: Final answer
   x = 1,470,575.36