Finding the Fourth Proportional to 13,379.28, 20,057.94 and 5,054.56

Step by Step Solution

1. Step 1: Write the proportion equation
   13,379.28 : 20,057.94 = 5,054.56 : x
2. Step 2: Convert to fraction form
   13,379.28/20,057.94 = 5,054.56/x
3. Step 3: Cross multiply
   13,379.28x = 20,057.94 × 5,054.56
4. Step 4: Simplify right side
   13,379.28x = 101,384,061.21
5. Step 5: Solve for x
   x = 101,384,061.21/13,379.28
6. Step 6: Final answer
   x = 7,577.69