Finding the Third Proportional to 4,340,978 and 9,429,018

Step by Step Solution

1. Step 1: Write the proportion equation
   4,340,978 : 9,429,018 = 9,429,018 : x
2. Step 2: Convert to fraction form
   4,340,978/9,429,018 = 9,429,018/x
3. Step 3: Cross multiply
   4,340,978x = 9,429,018 × 9,429,018
4. Step 4: Simplify right side
   4,340,978x = 88,906,380,444,324
5. Step 5: Solve for x
   x = 88,906,380,444,324/4,340,978
6. Step 6: Final answer
   x = 20,480,725.87