Finding the Fourth Proportional to 52.70, 72.61 and 42.34

Step by Step Solution

1. Step 1: Write the proportion equation
   52.70 : 72.61 = 42.34 : x
2. Step 2: Convert to fraction form
   52.70/72.61 = 42.34/x
3. Step 3: Cross multiply
   52.70x = 72.61 × 42.34
4. Step 4: Simplify right side
   52.70x = 3,074.31
5. Step 5: Solve for x
   x = 3,074.31/52.70
6. Step 6: Final answer
   x = 58.34