Finding the Fourth Proportional to 115,540.24, 159,427.56 and 65,238.16

Step by Step Solution

1. Step 1: Write the proportion equation
   115,540.24 : 159,427.56 = 65,238.16 : x
2. Step 2: Convert to fraction form
   115,540.24/159,427.56 = 65,238.16/x
3. Step 3: Cross multiply
   115,540.24x = 159,427.56 × 65,238.16
4. Step 4: Simplify right side
   115,540.24x = 10,400,760,667.69
5. Step 5: Solve for x
   x = 10,400,760,667.69/115,540.24
6. Step 6: Final answer
   x = 90,018.51