Finding the Third Proportional to 990,414 and 2,170,134

Step by Step Solution

1. Step 1: Write the proportion equation
   990,414 : 2,170,134 = 2,170,134 : x
2. Step 2: Convert to fraction form
   990,414/2,170,134 = 2,170,134/x
3. Step 3: Cross multiply
   990,414x = 2,170,134 × 2,170,134
4. Step 4: Simplify right side
   990,414x = 4,709,481,577,956
5. Step 5: Solve for x
   x = 4,709,481,577,956/990,414
6. Step 6: Final answer
   x = 4,755,063.62