Finding the Fourth Proportional to 91.89, 126.81 and 59.09

Step by Step Solution

1. Step 1: Write the proportion equation
   91.89 : 126.81 = 59.09 : x
2. Step 2: Convert to fraction form
   91.89/126.81 = 59.09/x
3. Step 3: Cross multiply
   91.89x = 126.81 × 59.09
4. Step 4: Simplify right side
   91.89x = 7,492.57
5. Step 5: Solve for x
   x = 7,492.57/91.89
6. Step 6: Final answer
   x = 81.54