Finding the Fourth Proportional to 143,638.53, 215,556.21 and 50,144.28

Step by Step Solution

1. Step 1: Write the proportion equation
   143,638.53 : 215,556.21 = 50,144.28 : x
2. Step 2: Convert to fraction form
   143,638.53/215,556.21 = 50,144.28/x
3. Step 3: Cross multiply
   143,638.53x = 215,556.21 × 50,144.28
4. Step 4: Simplify right side
   143,638.53x = 10,808,910,949.98
5. Step 5: Solve for x
   x = 10,808,910,949.98/143,638.53
6. Step 6: Final answer
   x = 75,250.78