Finding the Third Proportional to 872,379 and 1,878,390

Step by Step Solution

1. Step 1: Write the proportion equation
   872,379 : 1,878,390 = 1,878,390 : x
2. Step 2: Convert to fraction form
   872,379/1,878,390 = 1,878,390/x
3. Step 3: Cross multiply
   872,379x = 1,878,390 × 1,878,390
4. Step 4: Simplify right side
   872,379x = 3,528,348,992,100
5. Step 5: Solve for x
   x = 3,528,348,992,100/872,379
6. Step 6: Final answer
   x = 4,044,513.90