Finding the Fourth Proportional to 78.25, 117.37 and 34.91

Step by Step Solution

1. Step 1: Write the proportion equation
   78.25 : 117.37 = 34.91 : x
2. Step 2: Convert to fraction form
   78.25/117.37 = 34.91/x
3. Step 3: Cross multiply
   78.25x = 117.37 × 34.91
4. Step 4: Simplify right side
   78.25x = 4,096.89
5. Step 5: Solve for x
   x = 4,096.89/78.25
6. Step 6: Final answer
   x = 52.36