Finding the Third Proportional to 139,814 and 222,387

Step by Step Solution

1. Step 1: Write the proportion equation
   139,814 : 222,387 = 222,387 : x
2. Step 2: Convert to fraction form
   139,814/222,387 = 222,387/x
3. Step 3: Cross multiply
   139,814x = 222,387 × 222,387
4. Step 4: Simplify right side
   139,814x = 49,455,977,769
5. Step 5: Solve for x
   x = 49,455,977,769/139,814
6. Step 6: Final answer
   x = 353,726.94