Finding the Third Proportional to 315,483 and 688,066.50

Step by Step Solution

1. Step 1: Write the proportion equation
   315,483 : 688,066.50 = 688,066.50 : x
2. Step 2: Convert to fraction form
   315,483/688,066.50 = 688,066.50/x
3. Step 3: Cross multiply
   315,483x = 688,066.50 × 688,066.50
4. Step 4: Simplify right side
   315,483x = 473,435,508,422.25
5. Step 5: Solve for x
   x = 473,435,508,422.25/315,483
6. Step 6: Final answer
   x = 1,500,668.84