Finding the Third Proportional to 317,634 and 698,239.50

Step by Step Solution

1. Step 1: Write the proportion equation
   317,634 : 698,239.50 = 698,239.50 : x
2. Step 2: Convert to fraction form
   317,634/698,239.50 = 698,239.50/x
3. Step 3: Cross multiply
   317,634x = 698,239.50 × 698,239.50
4. Step 4: Simplify right side
   317,634x = 487,538,399,360.25
5. Step 5: Solve for x
   x = 487,538,399,360.25/317,634
6. Step 6: Final answer
   x = 1,534,906.21