Finding the Fourth Proportional to 91.92, 126.72 and 59.12

Step by Step Solution

1. Step 1: Write the proportion equation
   91.92 : 126.72 = 59.12 : x
2. Step 2: Convert to fraction form
   91.92/126.72 = 59.12/x
3. Step 3: Cross multiply
   91.92x = 126.72 × 59.12
4. Step 4: Simplify right side
   91.92x = 7,491.69
5. Step 5: Solve for x
   x = 7,491.69/91.92
6. Step 6: Final answer
   x = 81.50