Finding the Fourth Proportional to 196.39, 294.61 and 72.99

Step by Step Solution

1. Step 1: Write the proportion equation
   196.39 : 294.61 = 72.99 : x
2. Step 2: Convert to fraction form
   196.39/294.61 = 72.99/x
3. Step 3: Cross multiply
   196.39x = 294.61 × 72.99
4. Step 4: Simplify right side
   196.39x = 21,501.75
5. Step 5: Solve for x
   x = 21,501.75/196.39
6. Step 6: Final answer
   x = 109.49