Finding the Third Proportional to 990,412 and 2,170,122

Step by Step Solution

1. Step 1: Write the proportion equation
   990,412 : 2,170,122 = 2,170,122 : x
2. Step 2: Convert to fraction form
   990,412/2,170,122 = 2,170,122/x
3. Step 3: Cross multiply
   990,412x = 2,170,122 × 2,170,122
4. Step 4: Simplify right side
   990,412x = 4,709,429,494,884
5. Step 5: Solve for x
   x = 4,709,429,494,884/990,412
6. Step 6: Final answer
   x = 4,755,020.63