Finding the Fourth Proportional to 116.42, 174.45 and 70.72

Step by Step Solution

1. Step 1: Write the proportion equation
   116.42 : 174.45 = 70.72 : x
2. Step 2: Convert to fraction form
   116.42/174.45 = 70.72/x
3. Step 3: Cross multiply
   116.42x = 174.45 × 70.72
4. Step 4: Simplify right side
   116.42x = 12,337.10
5. Step 5: Solve for x
   x = 12,337.10/116.42
6. Step 6: Final answer
   x = 105.97