Finding the Third Proportional to 2,122,786 and 4,485,172

Step by Step Solution

1. Step 1: Write the proportion equation
   2,122,786 : 4,485,172 = 4,485,172 : x
2. Step 2: Convert to fraction form
   2,122,786/4,485,172 = 4,485,172/x
3. Step 3: Cross multiply
   2,122,786x = 4,485,172 × 4,485,172
4. Step 4: Simplify right side
   2,122,786x = 20,116,767,869,584
5. Step 5: Solve for x
   x = 20,116,767,869,584/2,122,786
6. Step 6: Final answer
   x = 9,476,587.78