Finding the Fourth Proportional to 132.86, 199.31 and 60.72

Step by Step Solution

1. Step 1: Write the proportion equation
   132.86 : 199.31 = 60.72 : x
2. Step 2: Convert to fraction form
   132.86/199.31 = 60.72/x
3. Step 3: Cross multiply
   132.86x = 199.31 × 60.72
4. Step 4: Simplify right side
   132.86x = 12,102.10
5. Step 5: Solve for x
   x = 12,102.10/132.86
6. Step 6: Final answer
   x = 91.09