Finding the Third Proportional to 315,979.50 and 658,212

Step by Step Solution

1. Step 1: Write the proportion equation
   315,979.50 : 658,212 = 658,212 : x
2. Step 2: Convert to fraction form
   315,979.50/658,212 = 658,212/x
3. Step 3: Cross multiply
   315,979.50x = 658,212 × 658,212
4. Step 4: Simplify right side
   315,979.50x = 433,243,036,944
5. Step 5: Solve for x
   x = 433,243,036,944/315,979.50
6. Step 6: Final answer
   x = 1,371,111.22