Finding the Fourth Proportional to 108.31, 149.47 and 69.50

Step by Step Solution

1. Step 1: Write the proportion equation
   108.31 : 149.47 = 69.50 : x
2. Step 2: Convert to fraction form
   108.31/149.47 = 69.50/x
3. Step 3: Cross multiply
   108.31x = 149.47 × 69.50
4. Step 4: Simplify right side
   108.31x = 10,388.17
5. Step 5: Solve for x
   x = 10,388.17/108.31
6. Step 6: Final answer
   x = 95.91