Finding the Third Proportional to 11,178,990 and 16,824,456

Step by Step Solution

1. Step 1: Write the proportion equation
   11,178,990 : 16,824,456 = 16,824,456 : x
2. Step 2: Convert to fraction form
   11,178,990/16,824,456 = 16,824,456/x
3. Step 3: Cross multiply
   11,178,990x = 16,824,456 × 16,824,456
4. Step 4: Simplify right side
   11,178,990x = 283,062,319,695,936
5. Step 5: Solve for x
   x = 283,062,319,695,936/11,178,990
6. Step 6: Final answer
   x = 25,320,920.74