Finding the Fourth Proportional to 73.39, 101.28 and 42.31

Step by Step Solution

1. Step 1: Write the proportion equation
   73.39 : 101.28 = 42.31 : x
2. Step 2: Convert to fraction form
   73.39/101.28 = 42.31/x
3. Step 3: Cross multiply
   73.39x = 101.28 × 42.31
4. Step 4: Simplify right side
   73.39x = 4,284.94
5. Step 5: Solve for x
   x = 4,284.94/73.39
6. Step 6: Final answer
   x = 58.38