Finding the Fourth Proportional to 91.82, 137.52 and 51.18

Step by Step Solution

1. Step 1: Write the proportion equation
   91.82 : 137.52 = 51.18 : x
2. Step 2: Convert to fraction form
   91.82/137.52 = 51.18/x
3. Step 3: Cross multiply
   91.82x = 137.52 × 51.18
4. Step 4: Simplify right side
   91.82x = 7,038.27
5. Step 5: Solve for x
   x = 7,038.27/91.82
6. Step 6: Final answer
   x = 76.66