Finding the Fourth Proportional to 124.34, 171.59 and 72.59

Step by Step Solution

1. Step 1: Write the proportion equation
   124.34 : 171.59 = 72.59 : x
2. Step 2: Convert to fraction form
   124.34/171.59 = 72.59/x
3. Step 3: Cross multiply
   124.34x = 171.59 × 72.59
4. Step 4: Simplify right side
   124.34x = 12,454.50
5. Step 5: Solve for x
   x = 12,454.50/124.34
6. Step 6: Final answer
   x = 100.17