Finding the Fourth Proportional to 104.10, 156.18 and 60.72

Step by Step Solution

1. Step 1: Write the proportion equation
   104.10 : 156.18 = 60.72 : x
2. Step 2: Convert to fraction form
   104.10/156.18 = 60.72/x
3. Step 3: Cross multiply
   104.10x = 156.18 × 60.72
4. Step 4: Simplify right side
   104.10x = 9,483.25
5. Step 5: Solve for x
   x = 9,483.25/104.10
6. Step 6: Final answer
   x = 91.10