Finding the Third Proportional to 4,131,990 and 8,927,916

Step by Step Solution

1. Step 1: Write the proportion equation
   4,131,990 : 8,927,916 = 8,927,916 : x
2. Step 2: Convert to fraction form
   4,131,990/8,927,916 = 8,927,916/x
3. Step 3: Cross multiply
   4,131,990x = 8,927,916 × 8,927,916
4. Step 4: Simplify right side
   4,131,990x = 79,707,684,103,056
5. Step 5: Solve for x
   x = 79,707,684,103,056/4,131,990
6. Step 6: Final answer
   x = 19,290,386.50