Finding the Fourth Proportional to 128.89, 177.82 and 93.89

Step by Step Solution

1. Step 1: Write the proportion equation
   128.89 : 177.82 = 93.89 : x
2. Step 2: Convert to fraction form
   128.89/177.82 = 93.89/x
3. Step 3: Cross multiply
   128.89x = 177.82 × 93.89
4. Step 4: Simplify right side
   128.89x = 16,695.52
5. Step 5: Solve for x
   x = 16,695.52/128.89
6. Step 6: Final answer
   x = 129.53