Finding the Third Proportional to 1,919,451 and 4,200,486

Step by Step Solution

1. Step 1: Write the proportion equation
   1,919,451 : 4,200,486 = 4,200,486 : x
2. Step 2: Convert to fraction form
   1,919,451/4,200,486 = 4,200,486/x
3. Step 3: Cross multiply
   1,919,451x = 4,200,486 × 4,200,486
4. Step 4: Simplify right side
   1,919,451x = 17,644,082,636,196
5. Step 5: Solve for x
   x = 17,644,082,636,196/1,919,451
6. Step 6: Final answer
   x = 9,192,254.78