Finding the Third Proportional to 139,414.50 and 221,584.50

Step by Step Solution

1. Step 1: Write the proportion equation
   139,414.50 : 221,584.50 = 221,584.50 : x
2. Step 2: Convert to fraction form
   139,414.50/221,584.50 = 221,584.50/x
3. Step 3: Cross multiply
   139,414.50x = 221,584.50 × 221,584.50
4. Step 4: Simplify right side
   139,414.50x = 49,099,690,640.25
5. Step 5: Solve for x
   x = 49,099,690,640.25/139,414.50
6. Step 6: Final answer
   x = 352,184.96