Finding the Third Proportional to 15,048,518 and 21,510,919

Step by Step Solution

1. Step 1: Write the proportion equation
   15,048,518 : 21,510,919 = 21,510,919 : x
2. Step 2: Convert to fraction form
   15,048,518/21,510,919 = 21,510,919/x
3. Step 3: Cross multiply
   15,048,518x = 21,510,919 × 21,510,919
4. Step 4: Simplify right side
   15,048,518x = 462,719,636,224,561
5. Step 5: Solve for x
   x = 462,719,636,224,561/15,048,518
6. Step 6: Final answer
   x = 30,748,518.64