Finding the Third Proportional to 242,821 and 368,605.50

Step by Step Solution

1. Step 1: Write the proportion equation
   242,821 : 368,605.50 = 368,605.50 : x
2. Step 2: Convert to fraction form
   242,821/368,605.50 = 368,605.50/x
3. Step 3: Cross multiply
   242,821x = 368,605.50 × 368,605.50
4. Step 4: Simplify right side
   242,821x = 135,870,014,630.25
5. Step 5: Solve for x
   x = 135,870,014,630.25/242,821
6. Step 6: Final answer
   x = 559,548.04