Finding the Fourth Proportional to 73.81, 110.38 and 53.31

Step by Step Solution

1. Step 1: Write the proportion equation
   73.81 : 110.38 = 53.31 : x
2. Step 2: Convert to fraction form
   73.81/110.38 = 53.31/x
3. Step 3: Cross multiply
   73.81x = 110.38 × 53.31
4. Step 4: Simplify right side
   73.81x = 5,883.89
5. Step 5: Solve for x
   x = 5,883.89/73.81
6. Step 6: Final answer
   x = 79.72