Finding the Third Proportional to 4,242,978 and 9,446,326

Step by Step Solution

1. Step 1: Write the proportion equation
   4,242,978 : 9,446,326 = 9,446,326 : x
2. Step 2: Convert to fraction form
   4,242,978/9,446,326 = 9,446,326/x
3. Step 3: Cross multiply
   4,242,978x = 9,446,326 × 9,446,326
4. Step 4: Simplify right side
   4,242,978x = 89,233,074,898,276
5. Step 5: Solve for x
   x = 89,233,074,898,276/4,242,978
6. Step 6: Final answer
   x = 21,030,765.40