Finding the Fourth Proportional to 67.63, 101.55 and 57.55

Step by Step Solution

1. Step 1: Write the proportion equation
   67.63 : 101.55 = 57.55 : x
2. Step 2: Convert to fraction form
   67.63/101.55 = 57.55/x
3. Step 3: Cross multiply
   67.63x = 101.55 × 57.55
4. Step 4: Simplify right side
   67.63x = 5,844.20
5. Step 5: Solve for x
   x = 5,844.20/67.63
6. Step 6: Final answer
   x = 86.41