Finding the Third Proportional to 990,410 and 2,170,118

Step by Step Solution

1. Step 1: Write the proportion equation
   990,410 : 2,170,118 = 2,170,118 : x
2. Step 2: Convert to fraction form
   990,410/2,170,118 = 2,170,118/x
3. Step 3: Cross multiply
   990,410x = 2,170,118 × 2,170,118
4. Step 4: Simplify right side
   990,410x = 4,709,412,133,924
5. Step 5: Solve for x
   x = 4,709,412,133,924/990,410
6. Step 6: Final answer
   x = 4,755,012.71