Finding the Third Proportional to 2,139,888 and 4,354,510

Step by Step Solution

1. Step 1: Write the proportion equation
   2,139,888 : 4,354,510 = 4,354,510 : x
2. Step 2: Convert to fraction form
   2,139,888/4,354,510 = 4,354,510/x
3. Step 3: Cross multiply
   2,139,888x = 4,354,510 × 4,354,510
4. Step 4: Simplify right side
   2,139,888x = 18,961,757,340,100
5. Step 5: Solve for x
   x = 18,961,757,340,100/2,139,888
6. Step 6: Final answer
   x = 8,861,098.03