Finding the Third Proportional to 9,407,447 and 19,945,303

Step by Step Solution

1. Step 1: Write the proportion equation
   9,407,447 : 19,945,303 = 19,945,303 : x
2. Step 2: Convert to fraction form
   9,407,447/19,945,303 = 19,945,303/x
3. Step 3: Cross multiply
   9,407,447x = 19,945,303 × 19,945,303
4. Step 4: Simplify right side
   9,407,447x = 397,815,111,761,809
5. Step 5: Solve for x
   x = 397,815,111,761,809/9,407,447
6. Step 6: Final answer
   x = 42,287,255.17