Finding the Fourth Proportional to 50,556.72, 75,835.12 and 13,620.72

Step by Step Solution

1. Step 1: Write the proportion equation
   50,556.72 : 75,835.12 = 13,620.72 : x
2. Step 2: Convert to fraction form
   50,556.72/75,835.12 = 13,620.72/x
3. Step 3: Cross multiply
   50,556.72x = 75,835.12 × 13,620.72
4. Step 4: Simplify right side
   50,556.72x = 1,032,928,935.69
5. Step 5: Solve for x
   x = 1,032,928,935.69/50,556.72
6. Step 6: Final answer
   x = 20,431.09