Finding the Fourth Proportional to 99.16, 136.82 and 55.49

Step by Step Solution

1. Step 1: Write the proportion equation
   99.16 : 136.82 = 55.49 : x
2. Step 2: Convert to fraction form
   99.16/136.82 = 55.49/x
3. Step 3: Cross multiply
   99.16x = 136.82 × 55.49
4. Step 4: Simplify right side
   99.16x = 7,591.60
5. Step 5: Solve for x
   x = 7,591.60/99.16
6. Step 6: Final answer
   x = 76.56