Finding the Third Proportional to 21,498,150,818 and 47,128,786,851

Step by Step Solution

1. Step 1: Write the proportion equation
   21,498,150,818 : 47,128,786,851 = 47,128,786,851 : x
2. Step 2: Convert to fraction form
   21,498,150,818/47,128,786,851 = 47,128,786,851/x
3. Step 3: Cross multiply
   21,498,150,818x = 47,128,786,851 × 47,128,786,851
4. Step 4: Simplify right side
   21,498,150,818x = 2,221,122,550,046,990,532,608
5. Step 5: Solve for x
   x = 2,221,122,550,046,990,532,608/21,498,150,818
6. Step 6: Final answer
   x = 103,316,911,712.58