Finding the Third Proportional to 397,786,144 and 867,828,500

Step by Step Solution

1. Step 1: Write the proportion equation
   397,786,144 : 867,828,500 = 867,828,500 : x
2. Step 2: Convert to fraction form
   397,786,144/867,828,500 = 867,828,500/x
3. Step 3: Cross multiply
   397,786,144x = 867,828,500 × 867,828,500
4. Step 4: Simplify right side
   397,786,144x = 753,126,305,412,249,984
5. Step 5: Solve for x
   x = 753,126,305,412,249,984/397,786,144
6. Step 6: Final answer
   x = 1,893,294,466.82