Finding the Third Proportional to 2,129,578 and 4,618,470

Step by Step Solution

1. Step 1: Write the proportion equation
   2,129,578 : 4,618,470 = 4,618,470 : x
2. Step 2: Convert to fraction form
   2,129,578/4,618,470 = 4,618,470/x
3. Step 3: Cross multiply
   2,129,578x = 4,618,470 × 4,618,470
4. Step 4: Simplify right side
   2,129,578x = 21,330,265,140,900
5. Step 5: Solve for x
   x = 21,330,265,140,900/2,129,578
6. Step 6: Final answer
   x = 10,016,193.42