Finding the Fourth Proportional to 90.29, 124.55 and 59.18

Step by Step Solution

1. Step 1: Write the proportion equation
   90.29 : 124.55 = 59.18 : x
2. Step 2: Convert to fraction form
   90.29/124.55 = 59.18/x
3. Step 3: Cross multiply
   90.29x = 124.55 × 59.18
4. Step 4: Simplify right side
   90.29x = 7,369.95
5. Step 5: Solve for x
   x = 7,369.95/90.29
6. Step 6: Final answer
   x = 81.63