Finding the Fourth Proportional to 83.72, 125.52 and 40.34

Step by Step Solution

1. Step 1: Write the proportion equation
   83.72 : 125.52 = 40.34 : x
2. Step 2: Convert to fraction form
   83.72/125.52 = 40.34/x
3. Step 3: Cross multiply
   83.72x = 125.52 × 40.34
4. Step 4: Simplify right side
   83.72x = 5,063.10
5. Step 5: Solve for x
   x = 5,063.10/83.72
6. Step 6: Final answer
   x = 60.48