Finding the Third Proportional to 317,537.25 and 684,930

Step by Step Solution

1. Step 1: Write the proportion equation
   317,537.25 : 684,930 = 684,930 : x
2. Step 2: Convert to fraction form
   317,537.25/684,930 = 684,930/x
3. Step 3: Cross multiply
   317,537.25x = 684,930 × 684,930
4. Step 4: Simplify right side
   317,537.25x = 469,129,104,900
5. Step 5: Solve for x
   x = 469,129,104,900/317,537.25
6. Step 6: Final answer
   x = 1,477,398.65