Finding the Third Proportional to 542,872 and 798,090

Step by Step Solution

1. Step 1: Write the proportion equation
   542,872 : 798,090 = 798,090 : x
2. Step 2: Convert to fraction form
   542,872/798,090 = 798,090/x
3. Step 3: Cross multiply
   542,872x = 798,090 × 798,090
4. Step 4: Simplify right side
   542,872x = 636,947,648,100
5. Step 5: Solve for x
   x = 636,947,648,100/542,872
6. Step 6: Final answer
   x = 1,173,292.50