Finding the Third Proportional to 5,006,578 and 10,278,565

Step by Step Solution

1. Step 1: Write the proportion equation
   5,006,578 : 10,278,565 = 10,278,565 : x
2. Step 2: Convert to fraction form
   5,006,578/10,278,565 = 10,278,565/x
3. Step 3: Cross multiply
   5,006,578x = 10,278,565 × 10,278,565
4. Step 4: Simplify right side
   5,006,578x = 105,648,898,459,225
5. Step 5: Solve for x
   x = 105,648,898,459,225/5,006,578
6. Step 6: Final answer
   x = 21,102,017.88