Finding the Third Proportional to 2,021,915 and 4,328,139

Step by Step Solution

1. Step 1: Write the proportion equation
   2,021,915 : 4,328,139 = 4,328,139 : x
2. Step 2: Convert to fraction form
   2,021,915/4,328,139 = 4,328,139/x
3. Step 3: Cross multiply
   2,021,915x = 4,328,139 × 4,328,139
4. Step 4: Simplify right side
   2,021,915x = 18,732,787,203,321
5. Step 5: Solve for x
   x = 18,732,787,203,321/2,021,915
6. Step 6: Final answer
   x = 9,264,873.75