Finding the Third Proportional to 10,990,564 and 16,812,216

Step by Step Solution

1. Step 1: Write the proportion equation
   10,990,564 : 16,812,216 = 16,812,216 : x
2. Step 2: Convert to fraction form
   10,990,564/16,812,216 = 16,812,216/x
3. Step 3: Cross multiply
   10,990,564x = 16,812,216 × 16,812,216
4. Step 4: Simplify right side
   10,990,564x = 282,650,606,830,656
5. Step 5: Solve for x
   x = 282,650,606,830,656/10,990,564
6. Step 6: Final answer
   x = 25,717,570.71