Finding the Fourth Proportional to 73.39, 109.82 and 42.88

Step by Step Solution

1. Step 1: Write the proportion equation
   73.39 : 109.82 = 42.88 : x
2. Step 2: Convert to fraction form
   73.39/109.82 = 42.88/x
3. Step 3: Cross multiply
   73.39x = 109.82 × 42.88
4. Step 4: Simplify right side
   73.39x = 4,709.08
5. Step 5: Solve for x
   x = 4,709.08/73.39
6. Step 6: Final answer
   x = 64.17