Finding the Fourth Proportional to 104.10, 143.61 and 72.59

Step by Step Solution

1. Step 1: Write the proportion equation
   104.10 : 143.61 = 72.59 : x
2. Step 2: Convert to fraction form
   104.10/143.61 = 72.59/x
3. Step 3: Cross multiply
   104.10x = 143.61 × 72.59
4. Step 4: Simplify right side
   104.10x = 10,423.93
5. Step 5: Solve for x
   x = 10,423.93/104.10
6. Step 6: Final answer
   x = 100.13