Finding the Fourth Proportional to 107.48, 161.01 and 86.82

Step by Step Solution

1. Step 1: Write the proportion equation
   107.48 : 161.01 = 86.82 : x
2. Step 2: Convert to fraction form
   107.48/161.01 = 86.82/x
3. Step 3: Cross multiply
   107.48x = 161.01 × 86.82
4. Step 4: Simplify right side
   107.48x = 13,978.89
5. Step 5: Solve for x
   x = 13,978.89/107.48
6. Step 6: Final answer
   x = 130.07