Finding the Fourth Proportional to 90.32, 123.93 and 86.67

Step by Step Solution

1. Step 1: Write the proportion equation
   90.32 : 123.93 = 86.67 : x
2. Step 2: Convert to fraction form
   90.32/123.93 = 86.67/x
3. Step 3: Cross multiply
   90.32x = 123.93 × 86.67
4. Step 4: Simplify right side
   90.32x = 10,741.01
5. Step 5: Solve for x
   x = 10,741.01/90.32
6. Step 6: Final answer
   x = 118.93