Finding the Fourth Proportional to 106.72, 147.32 and 69.89

Step by Step Solution

1. Step 1: Write the proportion equation
   106.72 : 147.32 = 69.89 : x
2. Step 2: Convert to fraction form
   106.72/147.32 = 69.89/x
3. Step 3: Cross multiply
   106.72x = 147.32 × 69.89
4. Step 4: Simplify right side
   106.72x = 10,295.79
5. Step 5: Solve for x
   x = 10,295.79/106.72
6. Step 6: Final answer
   x = 96.48