Finding the Fourth Proportional to 116.34, 174.18 and 72.89

Step by Step Solution

1. Step 1: Write the proportion equation
   116.34 : 174.18 = 72.89 : x
2. Step 2: Convert to fraction form
   116.34/174.18 = 72.89/x
3. Step 3: Cross multiply
   116.34x = 174.18 × 72.89
4. Step 4: Simplify right side
   116.34x = 12,695.11
5. Step 5: Solve for x
   x = 12,695.11/116.34
6. Step 6: Final answer
   x = 109.12