Finding the Third Proportional to 1,388,538 and 2,100,222

Step by Step Solution

1. Step 1: Write the proportion equation
   1,388,538 : 2,100,222 = 2,100,222 : x
2. Step 2: Convert to fraction form
   1,388,538/2,100,222 = 2,100,222/x
3. Step 3: Cross multiply
   1,388,538x = 2,100,222 × 2,100,222
4. Step 4: Simplify right side
   1,388,538x = 4,410,932,449,284
5. Step 5: Solve for x
   x = 4,410,932,449,284/1,388,538
6. Step 6: Final answer
   x = 3,176,673.92