Finding the Fourth Proportional to 72.58, 100.17 and 43.09

Step by Step Solution

1. Step 1: Write the proportion equation
   72.58 : 100.17 = 43.09 : x
2. Step 2: Convert to fraction form
   72.58/100.17 = 43.09/x
3. Step 3: Cross multiply
   72.58x = 100.17 × 43.09
4. Step 4: Simplify right side
   72.58x = 4,316.56
5. Step 5: Solve for x
   x = 4,316.56/72.58
6. Step 6: Final answer
   x = 59.47