Finding the Third Proportional to 872,644 and 1,280,224

Step by Step Solution

1. Step 1: Write the proportion equation
   872,644 : 1,280,224 = 1,280,224 : x
2. Step 2: Convert to fraction form
   872,644/1,280,224 = 1,280,224/x
3. Step 3: Cross multiply
   872,644x = 1,280,224 × 1,280,224
4. Step 4: Simplify right side
   872,644x = 1,638,973,490,176
5. Step 5: Solve for x
   x = 1,638,973,490,176/872,644
6. Step 6: Final answer
   x = 1,878,169.67