Finding the Third Proportional to 3,939,948 and 8,627,229

Step by Step Solution

1. Step 1: Write the proportion equation
   3,939,948 : 8,627,229 = 8,627,229 : x
2. Step 2: Convert to fraction form
   3,939,948/8,627,229 = 8,627,229/x
3. Step 3: Cross multiply
   3,939,948x = 8,627,229 × 8,627,229
4. Step 4: Simplify right side
   3,939,948x = 74,429,080,218,441
5. Step 5: Solve for x
   x = 74,429,080,218,441/3,939,948
6. Step 6: Final answer
   x = 18,890,878.82