Finding the Fourth Proportional to 78.34, 116.83 and 72.46

Step by Step Solution

1. Step 1: Write the proportion equation
   78.34 : 116.83 = 72.46 : x
2. Step 2: Convert to fraction form
   78.34/116.83 = 72.46/x
3. Step 3: Cross multiply
   78.34x = 116.83 × 72.46
4. Step 4: Simplify right side
   78.34x = 8,465.50
5. Step 5: Solve for x
   x = 8,465.50/78.34
6. Step 6: Final answer
   x = 108.06