Finding the Fourth Proportional to 96.18, 131.61 and 93.91

Step by Step Solution

1. Step 1: Write the proportion equation
   96.18 : 131.61 = 93.91 : x
2. Step 2: Convert to fraction form
   96.18/131.61 = 93.91/x
3. Step 3: Cross multiply
   96.18x = 131.61 × 93.91
4. Step 4: Simplify right side
   96.18x = 12,359.50
5. Step 5: Solve for x
   x = 12,359.50/96.18
6. Step 6: Final answer
   x = 128.50