Finding the Fourth Proportional to 123.31, 185.31 and 115.29

Step by Step Solution

1. Step 1: Write the proportion equation
   123.31 : 185.31 = 115.29 : x
2. Step 2: Convert to fraction form
   123.31/185.31 = 115.29/x
3. Step 3: Cross multiply
   123.31x = 185.31 × 115.29
4. Step 4: Simplify right side
   123.31x = 21,364.39
5. Step 5: Solve for x
   x = 21,364.39/123.31
6. Step 6: Final answer
   x = 173.26