Finding the Fourth Proportional to 83.39, 124.94 and 42.75

Step by Step Solution

1. Step 1: Write the proportion equation
   83.39 : 124.94 = 42.75 : x
2. Step 2: Convert to fraction form
   83.39/124.94 = 42.75/x
3. Step 3: Cross multiply
   83.39x = 124.94 × 42.75
4. Step 4: Simplify right side
   83.39x = 5,341.29
5. Step 5: Solve for x
   x = 5,341.29/83.39
6. Step 6: Final answer
   x = 64.06