Finding the Fourth Proportional to 93.41, 128.89 and 78.83

Step by Step Solution

1. Step 1: Write the proportion equation
   93.41 : 128.89 = 78.83 : x
2. Step 2: Convert to fraction form
   93.41/128.89 = 78.83/x
3. Step 3: Cross multiply
   93.41x = 128.89 × 78.83
4. Step 4: Simplify right side
   93.41x = 10,160.40
5. Step 5: Solve for x
   x = 10,160.40/93.41
6. Step 6: Final answer
   x = 108.77