Finding the Third Proportional to 317,594,755.25 and 687,951,443.50

Step by Step Solution

1. Step 1: Write the proportion equation
   317,594,755.25 : 687,951,443.50 = 687,951,443.50 : x
2. Step 2: Convert to fraction form
   317,594,755.25/687,951,443.50 = 687,951,443.50/x
3. Step 3: Cross multiply
   317,594,755.25x = 687,951,443.50 × 687,951,443.50
4. Step 4: Simplify right side
   317,594,755.25x = 473,277,188,613,733,696
5. Step 5: Solve for x
   x = 473,277,188,613,733,696/317,594,755.25
6. Step 6: Final answer
   x = 1,490,192,079.03