Finding the Third Proportional to 321,205.50 and 705,969

Step by Step Solution

1. Step 1: Write the proportion equation
   321,205.50 : 705,969 = 705,969 : x
2. Step 2: Convert to fraction form
   321,205.50/705,969 = 705,969/x
3. Step 3: Cross multiply
   321,205.50x = 705,969 × 705,969
4. Step 4: Simplify right side
   321,205.50x = 498,392,228,961
5. Step 5: Solve for x
   x = 498,392,228,961/321,205.50
6. Step 6: Final answer
   x = 1,551,630.43