Finding the Fourth Proportional to 104.50, 156.71 and 61.18

Step by Step Solution

1. Step 1: Write the proportion equation
   104.50 : 156.71 = 61.18 : x
2. Step 2: Convert to fraction form
   104.50/156.71 = 61.18/x
3. Step 3: Cross multiply
   104.50x = 156.71 × 61.18
4. Step 4: Simplify right side
   104.50x = 9,587.21
5. Step 5: Solve for x
   x = 9,587.21/104.50
6. Step 6: Final answer
   x = 91.75