Finding the Fourth Proportional to 106.56, 159.72 and 42.48

Step by Step Solution

1. Step 1: Write the proportion equation
   106.56 : 159.72 = 42.48 : x
2. Step 2: Convert to fraction form
   106.56/159.72 = 42.48/x
3. Step 3: Cross multiply
   106.56x = 159.72 × 42.48
4. Step 4: Simplify right side
   106.56x = 6,784.91
5. Step 5: Solve for x
   x = 6,784.91/106.56
6. Step 6: Final answer
   x = 63.67