Finding the Fourth Proportional to 52.84, 72.96 and 42.55

Step by Step Solution

1. Step 1: Write the proportion equation
   52.84 : 72.96 = 42.55 : x
2. Step 2: Convert to fraction form
   52.84/72.96 = 42.55/x
3. Step 3: Cross multiply
   52.84x = 72.96 × 42.55
4. Step 4: Simplify right side
   52.84x = 3,104.45
5. Step 5: Solve for x
   x = 3,104.45/52.84
6. Step 6: Final answer
   x = 58.75