Finding the Third Proportional to 2,123,638 and 4,620,518

Step by Step Solution

1. Step 1: Write the proportion equation
   2,123,638 : 4,620,518 = 4,620,518 : x
2. Step 2: Convert to fraction form
   2,123,638/4,620,518 = 4,620,518/x
3. Step 3: Cross multiply
   2,123,638x = 4,620,518 × 4,620,518
4. Step 4: Simplify right side
   2,123,638x = 21,349,186,588,324
5. Step 5: Solve for x
   x = 21,349,186,588,324/2,123,638
6. Step 6: Final answer
   x = 10,053,119.50