Finding the Fourth Proportional to 89.98, 134.27 and 75.40

Step by Step Solution

1. Step 1: Write the proportion equation
   89.98 : 134.27 = 75.40 : x
2. Step 2: Convert to fraction form
   89.98/134.27 = 75.40/x
3. Step 3: Cross multiply
   89.98x = 134.27 × 75.40
4. Step 4: Simplify right side
   89.98x = 10,123.95
5. Step 5: Solve for x
   x = 10,123.95/89.98
6. Step 6: Final answer
   x = 112.52