Finding the Fourth Proportional to 188.82, 260.52 and 123.31

Step by Step Solution

1. Step 1: Write the proportion equation
   188.82 : 260.52 = 123.31 : x
2. Step 2: Convert to fraction form
   188.82/260.52 = 123.31/x
3. Step 3: Cross multiply
   188.82x = 260.52 × 123.31
4. Step 4: Simplify right side
   188.82x = 32,124.72
5. Step 5: Solve for x
   x = 32,124.72/188.82
6. Step 6: Final answer
   x = 170.13