Finding the Fourth Proportional to 93.29, 128.72 and 54.48

Step by Step Solution

1. Step 1: Write the proportion equation
   93.29 : 128.72 = 54.48 : x
2. Step 2: Convert to fraction form
   93.29/128.72 = 54.48/x
3. Step 3: Cross multiply
   93.29x = 128.72 × 54.48
4. Step 4: Simplify right side
   93.29x = 7,012.67
5. Step 5: Solve for x
   x = 7,012.67/93.29
6. Step 6: Final answer
   x = 75.17