Finding the Third Proportional to 5,178,954 and 7,840,413

Step by Step Solution

1. Step 1: Write the proportion equation
   5,178,954 : 7,840,413 = 7,840,413 : x
2. Step 2: Convert to fraction form
   5,178,954/7,840,413 = 7,840,413/x
3. Step 3: Cross multiply
   5,178,954x = 7,840,413 × 7,840,413
4. Step 4: Simplify right side
   5,178,954x = 61,472,076,010,569
5. Step 5: Solve for x
   x = 61,472,076,010,569/5,178,954
6. Step 6: Final answer
   x = 11,869,592.97