Finding the Third Proportional to 3,939,588 and 8,467,680

Step by Step Solution

1. Step 1: Write the proportion equation
   3,939,588 : 8,467,680 = 8,467,680 : x
2. Step 2: Convert to fraction form
   3,939,588/8,467,680 = 8,467,680/x
3. Step 3: Cross multiply
   3,939,588x = 8,467,680 × 8,467,680
4. Step 4: Simplify right side
   3,939,588x = 71,701,604,582,400
5. Step 5: Solve for x
   x = 71,701,604,582,400/3,939,588
6. Step 6: Final answer
   x = 18,200,279.97