Finding the Third Proportional to 111,190.50 and 171,990

Step by Step Solution

1. Step 1: Write the proportion equation
   111,190.50 : 171,990 = 171,990 : x
2. Step 2: Convert to fraction form
   111,190.50/171,990 = 171,990/x
3. Step 3: Cross multiply
   111,190.50x = 171,990 × 171,990
4. Step 4: Simplify right side
   111,190.50x = 29,580,560,100
5. Step 5: Solve for x
   x = 29,580,560,100/111,190.50
6. Step 6: Final answer
   x = 266,034.96