Finding the Third Proportional to 139,800.50 and 213,766.75

Step by Step Solution

1. Step 1: Write the proportion equation
   139,800.50 : 213,766.75 = 213,766.75 : x
2. Step 2: Convert to fraction form
   139,800.50/213,766.75 = 213,766.75/x
3. Step 3: Cross multiply
   139,800.50x = 213,766.75 × 213,766.75
4. Step 4: Simplify right side
   139,800.50x = 45,696,223,405.56
5. Step 5: Solve for x
   x = 45,696,223,405.56/139,800.50
6. Step 6: Final answer
   x = 326,867.38