Finding the Third Proportional to 1,838,196 and 3,990,222

Step by Step Solution

1. Step 1: Write the proportion equation
   1,838,196 : 3,990,222 = 3,990,222 : x
2. Step 2: Convert to fraction form
   1,838,196/3,990,222 = 3,990,222/x
3. Step 3: Cross multiply
   1,838,196x = 3,990,222 × 3,990,222
4. Step 4: Simplify right side
   1,838,196x = 15,921,871,609,284
5. Step 5: Solve for x
   x = 15,921,871,609,284/1,838,196
6. Step 6: Final answer
   x = 8,661,683.31