Finding the Third Proportional to 315,064.69 and 683,642.53

Step by Step Solution

1. Step 1: Write the proportion equation
   315,064.69 : 683,642.53 = 683,642.53 : x
2. Step 2: Convert to fraction form
   315,064.69/683,642.53 = 683,642.53/x
3. Step 3: Cross multiply
   315,064.69x = 683,642.53 × 683,642.53
4. Step 4: Simplify right side
   315,064.69x = 467,367,110,533.91
5. Step 5: Solve for x
   x = 467,367,110,533.91/315,064.69
6. Step 6: Final answer
   x = 1,483,400.49