Finding the Fourth Proportional to 72.56, 108.58 and 46.89

Step by Step Solution

1. Step 1: Write the proportion equation
   72.56 : 108.58 = 46.89 : x
2. Step 2: Convert to fraction form
   72.56/108.58 = 46.89/x
3. Step 3: Cross multiply
   72.56x = 108.58 × 46.89
4. Step 4: Simplify right side
   72.56x = 5,091.32
5. Step 5: Solve for x
   x = 5,091.32/72.56
6. Step 6: Final answer
   x = 70.17