Finding the Fourth Proportional to 69.31, 103.96 and 42.22

Step by Step Solution

1. Step 1: Write the proportion equation
   69.31 : 103.96 = 42.22 : x
2. Step 2: Convert to fraction form
   69.31/103.96 = 42.22/x
3. Step 3: Cross multiply
   69.31x = 103.96 × 42.22
4. Step 4: Simplify right side
   69.31x = 4,388.83
5. Step 5: Solve for x
   x = 4,388.83/69.31
6. Step 6: Final answer
   x = 63.32