Finding the Fourth Proportional to 106.72, 147.29 and 69.42

Step by Step Solution

1. Step 1: Write the proportion equation
   106.72 : 147.29 = 69.42 : x
2. Step 2: Convert to fraction form
   106.72/147.29 = 69.42/x
3. Step 3: Cross multiply
   106.72x = 147.29 × 69.42
4. Step 4: Simplify right side
   106.72x = 10,224.51
5. Step 5: Solve for x
   x = 10,224.51/106.72
6. Step 6: Final answer
   x = 95.81