Finding the Third Proportional to 143,556 and 220,357.50

Step by Step Solution

1. Step 1: Write the proportion equation
   143,556 : 220,357.50 = 220,357.50 : x
2. Step 2: Convert to fraction form
   143,556/220,357.50 = 220,357.50/x
3. Step 3: Cross multiply
   143,556x = 220,357.50 × 220,357.50
4. Step 4: Simplify right side
   143,556x = 48,557,427,806.25
5. Step 5: Solve for x
   x = 48,557,427,806.25/143,556
6. Step 6: Final answer
   x = 338,247.29