Finding the Fourth Proportional to 101.72, 140.18 and 72.52

Step by Step Solution

1. Step 1: Write the proportion equation
   101.72 : 140.18 = 72.52 : x
2. Step 2: Convert to fraction form
   101.72/140.18 = 72.52/x
3. Step 3: Cross multiply
   101.72x = 140.18 × 72.52
4. Step 4: Simplify right side
   101.72x = 10,165.85
5. Step 5: Solve for x
   x = 10,165.85/101.72
6. Step 6: Final answer
   x = 99.94