Finding the Fourth Proportional to 69.32, 103.98 and 42.18

Step by Step Solution

1. Step 1: Write the proportion equation
   69.32 : 103.98 = 42.18 : x
2. Step 2: Convert to fraction form
   69.32/103.98 = 42.18/x
3. Step 3: Cross multiply
   69.32x = 103.98 × 42.18
4. Step 4: Simplify right side
   69.32x = 4,385.88
5. Step 5: Solve for x
   x = 4,385.88/69.32
6. Step 6: Final answer
   x = 63.27