Finding the Fourth Proportional to 101.38, 140.01 and 72.42

Step by Step Solution

1. Step 1: Write the proportion equation
   101.38 : 140.01 = 72.42 : x
2. Step 2: Convert to fraction form
   101.38/140.01 = 72.42/x
3. Step 3: Cross multiply
   101.38x = 140.01 × 72.42
4. Step 4: Simplify right side
   101.38x = 10,139.52
5. Step 5: Solve for x
   x = 10,139.52/101.38
6. Step 6: Final answer
   x = 100.02