Finding the Third Proportional to 50,390 and 109,990

Step by Step Solution

1. Step 1: Write the proportion equation
   50,390 : 109,990 = 109,990 : x
2. Step 2: Convert to fraction form
   50,390/109,990 = 109,990/x
3. Step 3: Cross multiply
   50,390x = 109,990 × 109,990
4. Step 4: Simplify right side
   50,390x = 12,097,800,100
5. Step 5: Solve for x
   x = 12,097,800,100/50,390
6. Step 6: Final answer
   x = 240,083.35