Finding the Fourth Proportional to 51,057.56, 76,589.98 and 13,617.42

Step by Step Solution

1. Step 1: Write the proportion equation
   51,057.56 : 76,589.98 = 13,617.42 : x
2. Step 2: Convert to fraction form
   51,057.56/76,589.98 = 13,617.42/x
3. Step 3: Cross multiply
   51,057.56x = 76,589.98 × 13,617.42
4. Step 4: Simplify right side
   51,057.56x = 1,042,957,925.45
5. Step 5: Solve for x
   x = 1,042,957,925.45/51,057.56
6. Step 6: Final answer
   x = 20,427.10