Finding the Third Proportional to 139,538 and 222,770.50

Step by Step Solution

1. Step 1: Write the proportion equation
   139,538 : 222,770.50 = 222,770.50 : x
2. Step 2: Convert to fraction form
   139,538/222,770.50 = 222,770.50/x
3. Step 3: Cross multiply
   139,538x = 222,770.50 × 222,770.50
4. Step 4: Simplify right side
   139,538x = 49,626,695,670.25
5. Step 5: Solve for x
   x = 49,626,695,670.25/139,538
6. Step 6: Final answer
   x = 355,650.04