Finding the Third Proportional to 139,710 and 221,322

Step by Step Solution

1. Step 1: Write the proportion equation
   139,710 : 221,322 = 221,322 : x
2. Step 2: Convert to fraction form
   139,710/221,322 = 221,322/x
3. Step 3: Cross multiply
   139,710x = 221,322 × 221,322
4. Step 4: Simplify right side
   139,710x = 48,983,427,684
5. Step 5: Solve for x
   x = 48,983,427,684/139,710
6. Step 6: Final answer
   x = 350,607.89