Finding the Fourth Proportional to 73.09, 100.81 and 53.42

Step by Step Solution

1. Step 1: Write the proportion equation
   73.09 : 100.81 = 53.42 : x
2. Step 2: Convert to fraction form
   73.09/100.81 = 53.42/x
3. Step 3: Cross multiply
   73.09x = 100.81 × 53.42
4. Step 4: Simplify right side
   73.09x = 5,385.27
5. Step 5: Solve for x
   x = 5,385.27/73.09
6. Step 6: Final answer
   x = 73.68