Finding the Third Proportional to 315,468.50 and 688,032

Step by Step Solution

1. Step 1: Write the proportion equation
   315,468.50 : 688,032 = 688,032 : x
2. Step 2: Convert to fraction form
   315,468.50/688,032 = 688,032/x
3. Step 3: Cross multiply
   315,468.50x = 688,032 × 688,032
4. Step 4: Simplify right side
   315,468.50x = 473,388,033,024
5. Step 5: Solve for x
   x = 473,388,033,024/315,468.50
6. Step 6: Final answer
   x = 1,500,587.33