Finding the Fourth Proportional to 52.39, 72.27 and 42.05

Step by Step Solution

1. Step 1: Write the proportion equation
   52.39 : 72.27 = 42.05 : x
2. Step 2: Convert to fraction form
   52.39/72.27 = 42.05/x
3. Step 3: Cross multiply
   52.39x = 72.27 × 42.05
4. Step 4: Simplify right side
   52.39x = 3,038.59
5. Step 5: Solve for x
   x = 3,038.59/52.39
6. Step 6: Final answer
   x = 58.00