Finding the Third Proportional to 9,936,866 and 21,290,260

Step by Step Solution

1. Step 1: Write the proportion equation
   9,936,866 : 21,290,260 = 21,290,260 : x
2. Step 2: Convert to fraction form
   9,936,866/21,290,260 = 21,290,260/x
3. Step 3: Cross multiply
   9,936,866x = 21,290,260 × 21,290,260
4. Step 4: Simplify right side
   9,936,866x = 453,275,170,867,600
5. Step 5: Solve for x
   x = 453,275,170,867,600/9,936,866
6. Step 6: Final answer
   x = 45,615,506.02