Finding the Third Proportional to 315,851.50 and 690,752

Step by Step Solution

1. Step 1: Write the proportion equation
   315,851.50 : 690,752 = 690,752 : x
2. Step 2: Convert to fraction form
   315,851.50/690,752 = 690,752/x
3. Step 3: Cross multiply
   315,851.50x = 690,752 × 690,752
4. Step 4: Simplify right side
   315,851.50x = 477,138,325,504
5. Step 5: Solve for x
   x = 477,138,325,504/315,851.50
6. Step 6: Final answer
   x = 1,510,641.32