Finding the Third Proportional to 315,024 and 691,282.50

Step by Step Solution

1. Step 1: Write the proportion equation
   315,024 : 691,282.50 = 691,282.50 : x
2. Step 2: Convert to fraction form
   315,024/691,282.50 = 691,282.50/x
3. Step 3: Cross multiply
   315,024x = 691,282.50 × 691,282.50
4. Step 4: Simplify right side
   315,024x = 477,871,494,806.25
5. Step 5: Solve for x
   x = 477,871,494,806.25/315,024
6. Step 6: Final answer
   x = 1,516,936.79