Finding the Third Proportional to 872,608 and 1,280,188

Step by Step Solution

1. Step 1: Write the proportion equation
   872,608 : 1,280,188 = 1,280,188 : x
2. Step 2: Convert to fraction form
   872,608/1,280,188 = 1,280,188/x
3. Step 3: Cross multiply
   872,608x = 1,280,188 × 1,280,188
4. Step 4: Simplify right side
   872,608x = 1,638,881,315,344
5. Step 5: Solve for x
   x = 1,638,881,315,344/872,608
6. Step 6: Final answer
   x = 1,878,141.52