Finding the Third Proportional to 322,209 and 706,390.50

Step by Step Solution

1. Step 1: Write the proportion equation
   322,209 : 706,390.50 = 706,390.50 : x
2. Step 2: Convert to fraction form
   322,209/706,390.50 = 706,390.50/x
3. Step 3: Cross multiply
   322,209x = 706,390.50 × 706,390.50
4. Step 4: Simplify right side
   322,209x = 498,987,538,490.25
5. Step 5: Solve for x
   x = 498,987,538,490.25/322,209
6. Step 6: Final answer
   x = 1,548,645.56