Finding the Fourth Proportional to 103.33, 142.64 and 72.37

Step by Step Solution

1. Step 1: Write the proportion equation
   103.33 : 142.64 = 72.37 : x
2. Step 2: Convert to fraction form
   103.33/142.64 = 72.37/x
3. Step 3: Cross multiply
   103.33x = 142.64 × 72.37
4. Step 4: Simplify right side
   103.33x = 10,322.86
5. Step 5: Solve for x
   x = 10,322.86/103.33
6. Step 6: Final answer
   x = 99.90