Finding the Fourth Proportional to 11,565.17, 15,945.37 and 9,438.54

Step by Step Solution

1. Step 1: Write the proportion equation
   11,565.17 : 15,945.37 = 9,438.54 : x
2. Step 2: Convert to fraction form
   11,565.17/15,945.37 = 9,438.54/x
3. Step 3: Cross multiply
   11,565.17x = 15,945.37 × 9,438.54
4. Step 4: Simplify right side
   11,565.17x = 150,501,012.56
5. Step 5: Solve for x
   x = 150,501,012.56/11,565.17
6. Step 6: Final answer
   x = 13,013.30