Finding the Third Proportional to 3,988,264 and 8,698,328

Step by Step Solution

1. Step 1: Write the proportion equation
   3,988,264 : 8,698,328 = 8,698,328 : x
2. Step 2: Convert to fraction form
   3,988,264/8,698,328 = 8,698,328/x
3. Step 3: Cross multiply
   3,988,264x = 8,698,328 × 8,698,328
4. Step 4: Simplify right side
   3,988,264x = 75,660,909,995,584
5. Step 5: Solve for x
   x = 75,660,909,995,584/3,988,264
6. Step 6: Final answer
   x = 18,970,888.08