Finding the Fourth Proportional to 73.56, 109.56 and 72.06

Step by Step Solution

1. Step 1: Write the proportion equation
   73.56 : 109.56 = 72.06 : x
2. Step 2: Convert to fraction form
   73.56/109.56 = 72.06/x
3. Step 3: Cross multiply
   73.56x = 109.56 × 72.06
4. Step 4: Simplify right side
   73.56x = 7,894.89
5. Step 5: Solve for x
   x = 7,894.89/73.56
6. Step 6: Final answer
   x = 107.33