Finding the Third Proportional to 5,381,478 and 8,341,218

Step by Step Solution

1. Step 1: Write the proportion equation
   5,381,478 : 8,341,218 = 8,341,218 : x
2. Step 2: Convert to fraction form
   5,381,478/8,341,218 = 8,341,218/x
3. Step 3: Cross multiply
   5,381,478x = 8,341,218 × 8,341,218
4. Step 4: Simplify right side
   5,381,478x = 69,575,917,723,524
5. Step 5: Solve for x
   x = 69,575,917,723,524/5,381,478
6. Step 6: Final answer
   x = 12,928,774.91