Finding the Third Proportional to 1,919,658 and 4,200,900

Step by Step Solution

1. Step 1: Write the proportion equation
   1,919,658 : 4,200,900 = 4,200,900 : x
2. Step 2: Convert to fraction form
   1,919,658/4,200,900 = 4,200,900/x
3. Step 3: Cross multiply
   1,919,658x = 4,200,900 × 4,200,900
4. Step 4: Simplify right side
   1,919,658x = 17,647,560,810,000
5. Step 5: Solve for x
   x = 17,647,560,810,000/1,919,658
6. Step 6: Final answer
   x = 9,193,075.44