Finding the Third Proportional to 321,151.50 and 705,861

Step by Step Solution

1. Step 1: Write the proportion equation
   321,151.50 : 705,861 = 705,861 : x
2. Step 2: Convert to fraction form
   321,151.50/705,861 = 705,861/x
3. Step 3: Cross multiply
   321,151.50x = 705,861 × 705,861
4. Step 4: Simplify right side
   321,151.50x = 498,239,751,321
5. Step 5: Solve for x
   x = 498,239,751,321/321,151.50
6. Step 6: Final answer
   x = 1,551,416.55