Finding the Third Proportional to 317,739 and 466,879.50

Step by Step Solution

1. Step 1: Write the proportion equation
   317,739 : 466,879.50 = 466,879.50 : x
2. Step 2: Convert to fraction form
   317,739/466,879.50 = 466,879.50/x
3. Step 3: Cross multiply
   317,739x = 466,879.50 × 466,879.50
4. Step 4: Simplify right side
   317,739x = 217,976,467,520.25
5. Step 5: Solve for x
   x = 217,976,467,520.25/317,739
6. Step 6: Final answer
   x = 686,023.65