Finding the Third Proportional to 2,178,612 and 4,787,256

Step by Step Solution

1. Step 1: Write the proportion equation
   2,178,612 : 4,787,256 = 4,787,256 : x
2. Step 2: Convert to fraction form
   2,178,612/4,787,256 = 4,787,256/x
3. Step 3: Cross multiply
   2,178,612x = 4,787,256 × 4,787,256
4. Step 4: Simplify right side
   2,178,612x = 22,917,820,009,536
5. Step 5: Solve for x
   x = 22,917,820,009,536/2,178,612
6. Step 6: Final answer
   x = 10,519,459.18