Finding the Third Proportional to 3,939,946 and 8,627,225

Step by Step Solution

1. Step 1: Write the proportion equation
   3,939,946 : 8,627,225 = 8,627,225 : x
2. Step 2: Convert to fraction form
   3,939,946/8,627,225 = 8,627,225/x
3. Step 3: Cross multiply
   3,939,946x = 8,627,225 × 8,627,225
4. Step 4: Simplify right side
   3,939,946x = 74,429,011,200,625
5. Step 5: Solve for x
   x = 74,429,011,200,625/3,939,946
6. Step 6: Final answer
   x = 18,890,870.89