Finding the Fourth Proportional to 74.56, 102.82 and 52.72

Step by Step Solution

1. Step 1: Write the proportion equation
   74.56 : 102.82 = 52.72 : x
2. Step 2: Convert to fraction form
   74.56/102.82 = 52.72/x
3. Step 3: Cross multiply
   74.56x = 102.82 × 52.72
4. Step 4: Simplify right side
   74.56x = 5,420.67
5. Step 5: Solve for x
   x = 5,420.67/74.56
6. Step 6: Final answer
   x = 72.70