Finding the Third Proportional to 5,429,218 and 8,398,896

Step by Step Solution

1. Step 1: Write the proportion equation
   5,429,218 : 8,398,896 = 8,398,896 : x
2. Step 2: Convert to fraction form
   5,429,218/8,398,896 = 8,398,896/x
3. Step 3: Cross multiply
   5,429,218x = 8,398,896 × 8,398,896
4. Step 4: Simplify right side
   5,429,218x = 70,541,454,018,816
5. Step 5: Solve for x
   x = 70,541,454,018,816/5,429,218
6. Step 6: Final answer
   x = 12,992,930.85