Finding the Fourth Proportional to 90.50, 135.71 and 75.98

Step by Step Solution

1. Step 1: Write the proportion equation
   90.50 : 135.71 = 75.98 : x
2. Step 2: Convert to fraction form
   90.50/135.71 = 75.98/x
3. Step 3: Cross multiply
   90.50x = 135.71 × 75.98
4. Step 4: Simplify right side
   90.50x = 10,311.21
5. Step 5: Solve for x
   x = 10,311.21/90.50
6. Step 6: Final answer
   x = 113.94