Finding the Fourth Proportional to 116.10, 160.17 and 72.48

Step by Step Solution

1. Step 1: Write the proportion equation
   116.10 : 160.17 = 72.48 : x
2. Step 2: Convert to fraction form
   116.10/160.17 = 72.48/x
3. Step 3: Cross multiply
   116.10x = 160.17 × 72.48
4. Step 4: Simplify right side
   116.10x = 11,609.12
5. Step 5: Solve for x
   x = 11,609.12/116.10
6. Step 6: Final answer
   x = 99.99