Finding the Fourth Proportional to 96.72, 145.00 and 69.31

Step by Step Solution

1. Step 1: Write the proportion equation
   96.72 : 145.00 = 69.31 : x
2. Step 2: Convert to fraction form
   96.72/145.00 = 69.31/x
3. Step 3: Cross multiply
   96.72x = 145.00 × 69.31
4. Step 4: Simplify right side
   96.72x = 10,049.50
5. Step 5: Solve for x
   x = 10,049.50/96.72
6. Step 6: Final answer
   x = 103.90