Finding the Third Proportional to 3,920,869 and 8,493,123

Step by Step Solution

1. Step 1: Write the proportion equation
   3,920,869 : 8,493,123 = 8,493,123 : x
2. Step 2: Convert to fraction form
   3,920,869/8,493,123 = 8,493,123/x
3. Step 3: Cross multiply
   3,920,869x = 8,493,123 × 8,493,123
4. Step 4: Simplify right side
   3,920,869x = 72,133,138,293,129
5. Step 5: Solve for x
   x = 72,133,138,293,129/3,920,869
6. Step 6: Final answer
   x = 18,397,232.42