Finding the Fourth Proportional to 83.23, 124.89 and 42.66

Step by Step Solution

1. Step 1: Write the proportion equation
   83.23 : 124.89 = 42.66 : x
2. Step 2: Convert to fraction form
   83.23/124.89 = 42.66/x
3. Step 3: Cross multiply
   83.23x = 124.89 × 42.66
4. Step 4: Simplify right side
   83.23x = 5,327.81
5. Step 5: Solve for x
   x = 5,327.81/83.23
6. Step 6: Final answer
   x = 64.01