Finding the Third Proportional to 4,455,872 and 9,419,712

Step by Step Solution

1. Step 1: Write the proportion equation
   4,455,872 : 9,419,712 = 9,419,712 : x
2. Step 2: Convert to fraction form
   4,455,872/9,419,712 = 9,419,712/x
3. Step 3: Cross multiply
   4,455,872x = 9,419,712 × 9,419,712
4. Step 4: Simplify right side
   4,455,872x = 88,730,974,162,944
5. Step 5: Solve for x
   x = 88,730,974,162,944/4,455,872
6. Step 6: Final answer
   x = 19,913,268.19