Finding the Third Proportional to 139,367.25 and 221,481

Step by Step Solution

1. Step 1: Write the proportion equation
   139,367.25 : 221,481 = 221,481 : x
2. Step 2: Convert to fraction form
   139,367.25/221,481 = 221,481/x
3. Step 3: Cross multiply
   139,367.25x = 221,481 × 221,481
4. Step 4: Simplify right side
   139,367.25x = 49,053,833,361
5. Step 5: Solve for x
   x = 49,053,833,361/139,367.25
6. Step 6: Final answer
   x = 351,975.33