Finding the Third Proportional to 542,869 and 798,085.50

Step by Step Solution

1. Step 1: Write the proportion equation
   542,869 : 798,085.50 = 798,085.50 : x
2. Step 2: Convert to fraction form
   542,869/798,085.50 = 798,085.50/x
3. Step 3: Cross multiply
   542,869x = 798,085.50 × 798,085.50
4. Step 4: Simplify right side
   542,869x = 636,940,465,310.25
5. Step 5: Solve for x
   x = 636,940,465,310.25/542,869
6. Step 6: Final answer
   x = 1,173,285.76