Finding the Third Proportional to 4,061,589 and 8,920,257

Step by Step Solution

1. Step 1: Write the proportion equation
   4,061,589 : 8,920,257 = 8,920,257 : x
2. Step 2: Convert to fraction form
   4,061,589/8,920,257 = 8,920,257/x
3. Step 3: Cross multiply
   4,061,589x = 8,920,257 × 8,920,257
4. Step 4: Simplify right side
   4,061,589x = 79,570,984,946,049
5. Step 5: Solve for x
   x = 79,570,984,946,049/4,061,589
6. Step 6: Final answer
   x = 19,591,097.21