Finding the Third Proportional to 2,178,936 and 4,787,856

Step by Step Solution

1. Step 1: Write the proportion equation
   2,178,936 : 4,787,856 = 4,787,856 : x
2. Step 2: Convert to fraction form
   2,178,936/4,787,856 = 4,787,856/x
3. Step 3: Cross multiply
   2,178,936x = 4,787,856 × 4,787,856
4. Step 4: Simplify right side
   2,178,936x = 22,923,565,076,736
5. Step 5: Solve for x
   x = 22,923,565,076,736/2,178,936
6. Step 6: Final answer
   x = 10,520,531.62