Finding the Fourth Proportional to 83.83, 125.67 and 42.72

Step by Step Solution

1. Step 1: Write the proportion equation
   83.83 : 125.67 = 42.72 : x
2. Step 2: Convert to fraction form
   83.83/125.67 = 42.72/x
3. Step 3: Cross multiply
   83.83x = 125.67 × 42.72
4. Step 4: Simplify right side
   83.83x = 5,368.62
5. Step 5: Solve for x
   x = 5,368.62/83.83
6. Step 6: Final answer
   x = 64.04