Finding the Fourth Proportional to 99.82, 137.61 and 88.89

Step by Step Solution

1. Step 1: Write the proportion equation
   99.82 : 137.61 = 88.89 : x
2. Step 2: Convert to fraction form
   99.82/137.61 = 88.89/x
3. Step 3: Cross multiply
   99.82x = 137.61 × 88.89
4. Step 4: Simplify right side
   99.82x = 12,232.15
5. Step 5: Solve for x
   x = 12,232.15/99.82
6. Step 6: Final answer
   x = 122.54