Finding the Fourth Proportional to 67.77, 101.49 and 53.29

Step by Step Solution

1. Step 1: Write the proportion equation
   67.77 : 101.49 = 53.29 : x
2. Step 2: Convert to fraction form
   67.77/101.49 = 53.29/x
3. Step 3: Cross multiply
   67.77x = 101.49 × 53.29
4. Step 4: Simplify right side
   67.77x = 5,407.89
5. Step 5: Solve for x
   x = 5,407.89/67.77
6. Step 6: Final answer
   x = 79.80