Finding the Fourth Proportional to 71.28, 106.83 and 32.78

Step by Step Solution

1. Step 1: Write the proportion equation
   71.28 : 106.83 = 32.78 : x
2. Step 2: Convert to fraction form
   71.28/106.83 = 32.78/x
3. Step 3: Cross multiply
   71.28x = 106.83 × 32.78
4. Step 4: Simplify right side
   71.28x = 3,501.89
5. Step 5: Solve for x
   x = 3,501.89/71.28
6. Step 6: Final answer
   x = 49.13