Finding the Fourth Proportional to 90.43, 124.82 and 61.27

Step by Step Solution

1. Step 1: Write the proportion equation
   90.43 : 124.82 = 61.27 : x
2. Step 2: Convert to fraction form
   90.43/124.82 = 61.27/x
3. Step 3: Cross multiply
   90.43x = 124.82 × 61.27
4. Step 4: Simplify right side
   90.43x = 7,647.42
5. Step 5: Solve for x
   x = 7,647.42/90.43
6. Step 6: Final answer
   x = 84.57