Finding the Third Proportional to 507,618 and 706,918.50

Step by Step Solution

1. Step 1: Write the proportion equation
   507,618 : 706,918.50 = 706,918.50 : x
2. Step 2: Convert to fraction form
   507,618/706,918.50 = 706,918.50/x
3. Step 3: Cross multiply
   507,618x = 706,918.50 × 706,918.50
4. Step 4: Simplify right side
   507,618x = 499,733,765,642.25
5. Step 5: Solve for x
   x = 499,733,765,642.25/507,618
6. Step 6: Final answer
   x = 984,468.17