Finding the Third Proportional to 339,448.50 and 706,788

Step by Step Solution

1. Step 1: Write the proportion equation
   339,448.50 : 706,788 = 706,788 : x
2. Step 2: Convert to fraction form
   339,448.50/706,788 = 706,788/x
3. Step 3: Cross multiply
   339,448.50x = 706,788 × 706,788
4. Step 4: Simplify right side
   339,448.50x = 499,549,276,944
5. Step 5: Solve for x
   x = 499,549,276,944/339,448.50
6. Step 6: Final answer
   x = 1,471,649.68