Finding the Third Proportional to 1,188,468 and 1,788,390

Step by Step Solution

1. Step 1: Write the proportion equation
   1,188,468 : 1,788,390 = 1,788,390 : x
2. Step 2: Convert to fraction form
   1,188,468/1,788,390 = 1,788,390/x
3. Step 3: Cross multiply
   1,188,468x = 1,788,390 × 1,788,390
4. Step 4: Simplify right side
   1,188,468x = 3,198,338,792,100
5. Step 5: Solve for x
   x = 3,198,338,792,100/1,188,468
6. Step 6: Final answer
   x = 2,691,144.22