Finding the Third Proportional to 872,406 and 1,279,854

Step by Step Solution

1. Step 1: Write the proportion equation
   872,406 : 1,279,854 = 1,279,854 : x
2. Step 2: Convert to fraction form
   872,406/1,279,854 = 1,279,854/x
3. Step 3: Cross multiply
   872,406x = 1,279,854 × 1,279,854
4. Step 4: Simplify right side
   872,406x = 1,638,026,261,316
5. Step 5: Solve for x
   x = 1,638,026,261,316/872,406
6. Step 6: Final answer
   x = 1,877,596.28