Finding the Fourth Proportional to 128.04, 191.82 and 123

Step by Step Solution

1. Step 1: Write the proportion equation
   128.04 : 191.82 = 123 : x
2. Step 2: Convert to fraction form
   128.04/191.82 = 123/x
3. Step 3: Cross multiply
   128.04x = 191.82 × 123
4. Step 4: Simplify right side
   128.04x = 23,593.86
5. Step 5: Solve for x
   x = 23,593.86/128.04
6. Step 6: Final answer
   x = 184.27