Finding the Third Proportional to 5,038,479 and 10,288,438

Step by Step Solution

1. Step 1: Write the proportion equation
   5,038,479 : 10,288,438 = 10,288,438 : x
2. Step 2: Convert to fraction form
   5,038,479/10,288,438 = 10,288,438/x
3. Step 3: Cross multiply
   5,038,479x = 10,288,438 × 10,288,438
4. Step 4: Simplify right side
   5,038,479x = 105,851,956,479,844
5. Step 5: Solve for x
   x = 105,851,956,479,844/5,038,479
6. Step 6: Final answer
   x = 21,008,712.45