Finding the Fourth Proportional to 67.31, 93.31 and 63.84

Step by Step Solution

1. Step 1: Write the proportion equation
   67.31 : 93.31 = 63.84 : x
2. Step 2: Convert to fraction form
   67.31/93.31 = 63.84/x
3. Step 3: Cross multiply
   67.31x = 93.31 × 63.84
4. Step 4: Simplify right side
   67.31x = 5,956.91
5. Step 5: Solve for x
   x = 5,956.91/67.31
6. Step 6: Final answer
   x = 88.50