Finding the Fourth Proportional to 116.72, 174.71 and 83.72

Step by Step Solution

1. Step 1: Write the proportion equation
   116.72 : 174.71 = 83.72 : x
2. Step 2: Convert to fraction form
   116.72/174.71 = 83.72/x
3. Step 3: Cross multiply
   116.72x = 174.71 × 83.72
4. Step 4: Simplify right side
   116.72x = 14,626.72
5. Step 5: Solve for x
   x = 14,626.72/116.72
6. Step 6: Final answer
   x = 125.31