Finding the Fourth Proportional to 73.18, 109.60 and 42.69

Step by Step Solution

1. Step 1: Write the proportion equation
   73.18 : 109.60 = 42.69 : x
2. Step 2: Convert to fraction form
   73.18/109.60 = 42.69/x
3. Step 3: Cross multiply
   73.18x = 109.60 × 42.69
4. Step 4: Simplify right side
   73.18x = 4,678.72
5. Step 5: Solve for x
   x = 4,678.72/73.18
6. Step 6: Final answer
   x = 63.94