Finding the Third Proportional to 317,621.25 and 699,192

Step by Step Solution

1. Step 1: Write the proportion equation
   317,621.25 : 699,192 = 699,192 : x
2. Step 2: Convert to fraction form
   317,621.25/699,192 = 699,192/x
3. Step 3: Cross multiply
   317,621.25x = 699,192 × 699,192
4. Step 4: Simplify right side
   317,621.25x = 488,869,452,864
5. Step 5: Solve for x
   x = 488,869,452,864/317,621.25
6. Step 6: Final answer
   x = 1,539,158.52