Finding the Fourth Proportional to 89.79, 134.72 and 28.93

Step by Step Solution

1. Step 1: Write the proportion equation
   89.79 : 134.72 = 28.93 : x
2. Step 2: Convert to fraction form
   89.79/134.72 = 28.93/x
3. Step 3: Cross multiply
   89.79x = 134.72 × 28.93
4. Step 4: Simplify right side
   89.79x = 3,897.45
5. Step 5: Solve for x
   x = 3,897.45/89.79
6. Step 6: Final answer
   x = 43.41