Finding the Third Proportional to 3,988,164 and 8,698,148

Step by Step Solution

1. Step 1: Write the proportion equation
   3,988,164 : 8,698,148 = 8,698,148 : x
2. Step 2: Convert to fraction form
   3,988,164/8,698,148 = 8,698,148/x
3. Step 3: Cross multiply
   3,988,164x = 8,698,148 × 8,698,148
4. Step 4: Simplify right side
   3,988,164x = 75,657,778,629,904
5. Step 5: Solve for x
   x = 75,657,778,629,904/3,988,164
6. Step 6: Final answer
   x = 18,970,578.60