Finding the Third Proportional to 317,844 and 686,101.50

Step by Step Solution

1. Step 1: Write the proportion equation
   317,844 : 686,101.50 = 686,101.50 : x
2. Step 2: Convert to fraction form
   317,844/686,101.50 = 686,101.50/x
3. Step 3: Cross multiply
   317,844x = 686,101.50 × 686,101.50
4. Step 4: Simplify right side
   317,844x = 470,735,268,302.25
5. Step 5: Solve for x
   x = 470,735,268,302.25/317,844
6. Step 6: Final answer
   x = 1,481,026.13