Finding the Third Proportional to 142,413.42 and 309,276.83

Step by Step Solution

1. Step 1: Write the proportion equation
   142,413.42 : 309,276.83 = 309,276.83 : x
2. Step 2: Convert to fraction form
   142,413.42/309,276.83 = 309,276.83/x
3. Step 3: Cross multiply
   142,413.42x = 309,276.83 × 309,276.83
4. Step 4: Simplify right side
   142,413.42x = 95,652,155,206.95
5. Step 5: Solve for x
   x = 95,652,155,206.95/142,413.42
6. Step 6: Final answer
   x = 671,651.25