Finding the Third Proportional to 139,752 and 221,400

Step by Step Solution

1. Step 1: Write the proportion equation
   139,752 : 221,400 = 221,400 : x
2. Step 2: Convert to fraction form
   139,752/221,400 = 221,400/x
3. Step 3: Cross multiply
   139,752x = 221,400 × 221,400
4. Step 4: Simplify right side
   139,752x = 49,017,960,000
5. Step 5: Solve for x
   x = 49,017,960,000/139,752
6. Step 6: Final answer
   x = 350,749.61