Finding the Fourth Proportional to 72.56, 100.52 and 71.12

Step by Step Solution

1. Step 1: Write the proportion equation
   72.56 : 100.52 = 71.12 : x
2. Step 2: Convert to fraction form
   72.56/100.52 = 71.12/x
3. Step 3: Cross multiply
   72.56x = 100.52 × 71.12
4. Step 4: Simplify right side
   72.56x = 7,148.98
5. Step 5: Solve for x
   x = 7,148.98/72.56
6. Step 6: Final answer
   x = 98.53