Finding the Third Proportional to 4,009,776 and 8,645,496

Step by Step Solution

1. Step 1: Write the proportion equation
   4,009,776 : 8,645,496 = 8,645,496 : x
2. Step 2: Convert to fraction form
   4,009,776/8,645,496 = 8,645,496/x
3. Step 3: Cross multiply
   4,009,776x = 8,645,496 × 8,645,496
4. Step 4: Simplify right side
   4,009,776x = 74,744,601,086,016
5. Step 5: Solve for x
   x = 74,744,601,086,016/4,009,776
6. Step 6: Final answer
   x = 18,640,592.66