Finding the Fourth Proportional to 67.51, 101.31 and 56.71

Step by Step Solution

1. Step 1: Write the proportion equation
   67.51 : 101.31 = 56.71 : x
2. Step 2: Convert to fraction form
   67.51/101.31 = 56.71/x
3. Step 3: Cross multiply
   67.51x = 101.31 × 56.71
4. Step 4: Simplify right side
   67.51x = 5,745.29
5. Step 5: Solve for x
   x = 5,745.29/67.51
6. Step 6: Final answer
   x = 85.10