Finding the Third Proportional to 542,817 and 798,436.50

Step by Step Solution

1. Step 1: Write the proportion equation
   542,817 : 798,436.50 = 798,436.50 : x
2. Step 2: Convert to fraction form
   542,817/798,436.50 = 798,436.50/x
3. Step 3: Cross multiply
   542,817x = 798,436.50 × 798,436.50
4. Step 4: Simplify right side
   542,817x = 637,500,844,532.25
5. Step 5: Solve for x
   x = 637,500,844,532.25/542,817
6. Step 6: Final answer
   x = 1,174,430.51