Finding the Fourth Proportional to 73.91, 101.89 and 55.42

Step by Step Solution

1. Step 1: Write the proportion equation
   73.91 : 101.89 = 55.42 : x
2. Step 2: Convert to fraction form
   73.91/101.89 = 55.42/x
3. Step 3: Cross multiply
   73.91x = 101.89 × 55.42
4. Step 4: Simplify right side
   73.91x = 5,646.56
5. Step 5: Solve for x
   x = 5,646.56/73.91
6. Step 6: Final answer
   x = 76.40