Finding the Fourth Proportional to 124.16, 171.32 and 71.69

Step by Step Solution

1. Step 1: Write the proportion equation
   124.16 : 171.32 = 71.69 : x
2. Step 2: Convert to fraction form
   124.16/171.32 = 71.69/x
3. Step 3: Cross multiply
   124.16x = 171.32 × 71.69
4. Step 4: Simplify right side
   124.16x = 12,280.72
5. Step 5: Solve for x
   x = 12,280.72/124.16
6. Step 6: Final answer
   x = 98.91