Finding the Fourth Proportional to 71.32, 106.86 and 28.52

Step by Step Solution

1. Step 1: Write the proportion equation
   71.32 : 106.86 = 28.52 : x
2. Step 2: Convert to fraction form
   71.32/106.86 = 28.52/x
3. Step 3: Cross multiply
   71.32x = 106.86 × 28.52
4. Step 4: Simplify right side
   71.32x = 3,047.65
5. Step 5: Solve for x
   x = 3,047.65/71.32
6. Step 6: Final answer
   x = 42.73