Finding the Third Proportional to 139,570.50 and 199,351.50

Step by Step Solution

1. Step 1: Write the proportion equation
   139,570.50 : 199,351.50 = 199,351.50 : x
2. Step 2: Convert to fraction form
   139,570.50/199,351.50 = 199,351.50/x
3. Step 3: Cross multiply
   139,570.50x = 199,351.50 × 199,351.50
4. Step 4: Simplify right side
   139,570.50x = 39,741,020,552.25
5. Step 5: Solve for x
   x = 39,741,020,552.25/139,570.50
6. Step 6: Final answer
   x = 284,737.97