Finding the Third Proportional to 315,694.69 and 692,509.50

Step by Step Solution

1. Step 1: Write the proportion equation
   315,694.69 : 692,509.50 = 692,509.50 : x
2. Step 2: Convert to fraction form
   315,694.69/692,509.50 = 692,509.50/x
3. Step 3: Cross multiply
   315,694.69x = 692,509.50 × 692,509.50
4. Step 4: Simplify right side
   315,694.69x = 479,569,407,590.25
5. Step 5: Solve for x
   x = 479,569,407,590.25/315,694.69
6. Step 6: Final answer
   x = 1,519,092.42