Finding the Fourth Proportional to 83.02, 124.71 and 80.29

Step by Step Solution

1. Step 1: Write the proportion equation
   83.02 : 124.71 = 80.29 : x
2. Step 2: Convert to fraction form
   83.02/124.71 = 80.29/x
3. Step 3: Cross multiply
   83.02x = 124.71 × 80.29
4. Step 4: Simplify right side
   83.02x = 10,013.17
5. Step 5: Solve for x
   x = 10,013.17/83.02
6. Step 6: Final answer
   x = 120.61