Finding the Third Proportional to 9,986,274 and 21,515,206

Step by Step Solution

1. Step 1: Write the proportion equation
   9,986,274 : 21,515,206 = 21,515,206 : x
2. Step 2: Convert to fraction form
   9,986,274/21,515,206 = 21,515,206/x
3. Step 3: Cross multiply
   9,986,274x = 21,515,206 × 21,515,206
4. Step 4: Simplify right side
   9,986,274x = 462,904,089,222,436
5. Step 5: Solve for x
   x = 462,904,089,222,436/9,986,274
6. Step 6: Final answer
   x = 46,354,034.47