Finding the Third Proportional to 21,149,792,364 and 31,640,833,530

Step by Step Solution

1. Step 1: Write the proportion equation
   21,149,792,364 : 31,640,833,530 = 31,640,833,530 : x
2. Step 2: Convert to fraction form
   21,149,792,364/31,640,833,530 = 31,640,833,530/x
3. Step 3: Cross multiply
   21,149,792,364x = 31,640,833,530 × 31,640,833,530
4. Step 4: Simplify right side
   21,149,792,364x = 1,001,142,346,473,172,238,336
5. Step 5: Solve for x
   x = 1,001,142,346,473,172,238,336/21,149,792,364
6. Step 6: Final answer
   x = 47,335,800,240.63