Finding the Third Proportional to 140,991 and 218,452.50

Step by Step Solution

1. Step 1: Write the proportion equation
   140,991 : 218,452.50 = 218,452.50 : x
2. Step 2: Convert to fraction form
   140,991/218,452.50 = 218,452.50/x
3. Step 3: Cross multiply
   140,991x = 218,452.50 × 218,452.50
4. Step 4: Simplify right side
   140,991x = 47,721,494,756.25
5. Step 5: Solve for x
   x = 47,721,494,756.25/140,991
6. Step 6: Final answer
   x = 338,471.92