Finding the Third Proportional to 4,589,788 and 9,990,224

Step by Step Solution

1. Step 1: Write the proportion equation
   4,589,788 : 9,990,224 = 9,990,224 : x
2. Step 2: Convert to fraction form
   4,589,788/9,990,224 = 9,990,224/x
3. Step 3: Cross multiply
   4,589,788x = 9,990,224 × 9,990,224
4. Step 4: Simplify right side
   4,589,788x = 99,804,575,570,176
5. Step 5: Solve for x
   x = 99,804,575,570,176/4,589,788
6. Step 6: Final answer
   x = 21,744,920.59