Finding the Fourth Proportional to 67.91, 93.61 and 53.33

Step by Step Solution

1. Step 1: Write the proportion equation
   67.91 : 93.61 = 53.33 : x
2. Step 2: Convert to fraction form
   67.91/93.61 = 53.33/x
3. Step 3: Cross multiply
   67.91x = 93.61 × 53.33
4. Step 4: Simplify right side
   67.91x = 4,992.22
5. Step 5: Solve for x
   x = 4,992.22/67.91
6. Step 6: Final answer
   x = 73.51