Finding the Fourth Proportional to 67.86, 101.52 and 56.31

Step by Step Solution

1. Step 1: Write the proportion equation
   67.86 : 101.52 = 56.31 : x
2. Step 2: Convert to fraction form
   67.86/101.52 = 56.31/x
3. Step 3: Cross multiply
   67.86x = 101.52 × 56.31
4. Step 4: Simplify right side
   67.86x = 5,716.59
5. Step 5: Solve for x
   x = 5,716.59/67.86
6. Step 6: Final answer
   x = 84.24