Finding the Third Proportional to 4,574,978 and 9,903,108

Step by Step Solution

1. Step 1: Write the proportion equation
   4,574,978 : 9,903,108 = 9,903,108 : x
2. Step 2: Convert to fraction form
   4,574,978/9,903,108 = 9,903,108/x
3. Step 3: Cross multiply
   4,574,978x = 9,903,108 × 9,903,108
4. Step 4: Simplify right side
   4,574,978x = 98,071,548,059,664
5. Step 5: Solve for x
   x = 98,071,548,059,664/4,574,978
6. Step 6: Final answer
   x = 21,436,507.03