Finding the Third Proportional to 1,919,547 and 4,200,678

Step by Step Solution

1. Step 1: Write the proportion equation
   1,919,547 : 4,200,678 = 4,200,678 : x
2. Step 2: Convert to fraction form
   1,919,547/4,200,678 = 4,200,678/x
3. Step 3: Cross multiply
   1,919,547x = 4,200,678 × 4,200,678
4. Step 4: Simplify right side
   1,919,547x = 17,645,695,659,684
5. Step 5: Solve for x
   x = 17,645,695,659,684/1,919,547
6. Step 6: Final answer
   x = 9,192,635.38