Finding the Third Proportional to 4,426,978 and 9,674,108

Step by Step Solution

1. Step 1: Write the proportion equation
   4,426,978 : 9,674,108 = 9,674,108 : x
2. Step 2: Convert to fraction form
   4,426,978/9,674,108 = 9,674,108/x
3. Step 3: Cross multiply
   4,426,978x = 9,674,108 × 9,674,108
4. Step 4: Simplify right side
   4,426,978x = 93,588,365,595,664
5. Step 5: Solve for x
   x = 93,588,365,595,664/4,426,978
6. Step 6: Final answer
   x = 21,140,463.22