Finding the Third Proportional to 9,407,439 and 19,945,287

Step by Step Solution

1. Step 1: Write the proportion equation
   9,407,439 : 19,945,287 = 19,945,287 : x
2. Step 2: Convert to fraction form
   9,407,439/19,945,287 = 19,945,287/x
3. Step 3: Cross multiply
   9,407,439x = 19,945,287 × 19,945,287
4. Step 4: Simplify right side
   9,407,439x = 397,814,473,512,369
5. Step 5: Solve for x
   x = 397,814,473,512,369/9,407,439
6. Step 6: Final answer
   x = 42,287,223.28