Finding the Fourth Proportional to 90.50, 124.86 and 59.42

Step by Step Solution

1. Step 1: Write the proportion equation
   90.50 : 124.86 = 59.42 : x
2. Step 2: Convert to fraction form
   90.50/124.86 = 59.42/x
3. Step 3: Cross multiply
   90.50x = 124.86 × 59.42
4. Step 4: Simplify right side
   90.50x = 7,418.56
5. Step 5: Solve for x
   x = 7,418.56/90.50
6. Step 6: Final answer
   x = 81.98