Finding the Third Proportional to 315,984.38 and 676,255.50

Step by Step Solution

1. Step 1: Write the proportion equation
   315,984.38 : 676,255.50 = 676,255.50 : x
2. Step 2: Convert to fraction form
   315,984.38/676,255.50 = 676,255.50/x
3. Step 3: Cross multiply
   315,984.38x = 676,255.50 × 676,255.50
4. Step 4: Simplify right side
   315,984.38x = 457,321,501,280.25
5. Step 5: Solve for x
   x = 457,321,501,280.25/315,984.38
6. Step 6: Final answer
   x = 1,447,291.50