Finding the Third Proportional to 4,074,399 and 8,634,492

Step by Step Solution

1. Step 1: Write the proportion equation
   4,074,399 : 8,634,492 = 8,634,492 : x
2. Step 2: Convert to fraction form
   4,074,399/8,634,492 = 8,634,492/x
3. Step 3: Cross multiply
   4,074,399x = 8,634,492 × 8,634,492
4. Step 4: Simplify right side
   4,074,399x = 74,554,452,098,064
5. Step 5: Solve for x
   x = 74,554,452,098,064/4,074,399
6. Step 6: Final answer
   x = 18,298,269.78