Finding the Fourth Proportional to 75.89, 104.72 and 42.23

Step by Step Solution

1. Step 1: Write the proportion equation
   75.89 : 104.72 = 42.23 : x
2. Step 2: Convert to fraction form
   75.89/104.72 = 42.23/x
3. Step 3: Cross multiply
   75.89x = 104.72 × 42.23
4. Step 4: Simplify right side
   75.89x = 4,422.61
5. Step 5: Solve for x
   x = 4,422.61/75.89
6. Step 6: Final answer
   x = 58.28