Finding the Third Proportional to 3,938,839 and 8,549,910

Step by Step Solution

1. Step 1: Write the proportion equation
   3,938,839 : 8,549,910 = 8,549,910 : x
2. Step 2: Convert to fraction form
   3,938,839/8,549,910 = 8,549,910/x
3. Step 3: Cross multiply
   3,938,839x = 8,549,910 × 8,549,910
4. Step 4: Simplify right side
   3,938,839x = 73,100,961,008,100
5. Step 5: Solve for x
   x = 73,100,961,008,100/3,938,839
6. Step 6: Final answer
   x = 18,559,012.19