Finding the Fourth Proportional to 168.89, 253.35 and 53.33

Step by Step Solution

1. Step 1: Write the proportion equation
   168.89 : 253.35 = 53.33 : x
2. Step 2: Convert to fraction form
   168.89/253.35 = 53.33/x
3. Step 3: Cross multiply
   168.89x = 253.35 × 53.33
4. Step 4: Simplify right side
   168.89x = 13,509.89
5. Step 5: Solve for x
   x = 13,509.89/168.89
6. Step 6: Final answer
   x = 79.99