Finding the Fourth Proportional to 78.37, 117.71 and 63.94

Step by Step Solution

1. Step 1: Write the proportion equation
   78.37 : 117.71 = 63.94 : x
2. Step 2: Convert to fraction form
   78.37/117.71 = 63.94/x
3. Step 3: Cross multiply
   78.37x = 117.71 × 63.94
4. Step 4: Simplify right side
   78.37x = 7,526.38
5. Step 5: Solve for x
   x = 7,526.38/78.37
6. Step 6: Final answer
   x = 96.04