Finding the Third Proportional to 2,122,789 and 4,485,178

Step by Step Solution

1. Step 1: Write the proportion equation
   2,122,789 : 4,485,178 = 4,485,178 : x
2. Step 2: Convert to fraction form
   2,122,789/4,485,178 = 4,485,178/x
3. Step 3: Cross multiply
   2,122,789x = 4,485,178 × 4,485,178
4. Step 4: Simplify right side
   2,122,789x = 20,116,821,691,684
5. Step 5: Solve for x
   x = 20,116,821,691,684/2,122,789
6. Step 6: Final answer
   x = 9,476,599.74