Finding the Fourth Proportional to 100.42, 137.35 and 98.82

Step by Step Solution

1. Step 1: Write the proportion equation
   100.42 : 137.35 = 98.82 : x
2. Step 2: Convert to fraction form
   100.42/137.35 = 98.82/x
3. Step 3: Cross multiply
   100.42x = 137.35 × 98.82
4. Step 4: Simplify right side
   100.42x = 13,573.05
5. Step 5: Solve for x
   x = 13,573.05/100.42
6. Step 6: Final answer
   x = 135.17