Finding the Third Proportional to 3,990,144 and 6,191,061

Step by Step Solution

1. Step 1: Write the proportion equation
   3,990,144 : 6,191,061 = 6,191,061 : x
2. Step 2: Convert to fraction form
   3,990,144/6,191,061 = 6,191,061/x
3. Step 3: Cross multiply
   3,990,144x = 6,191,061 × 6,191,061
4. Step 4: Simplify right side
   3,990,144x = 38,329,236,305,721
5. Step 5: Solve for x
   x = 38,329,236,305,721/3,990,144
6. Step 6: Final answer
   x = 9,605,978.21