Finding the Third Proportional to 123.19 and 187.31

Step by Step Solution

1. Step 1: Write the proportion equation
   123.19 : 187.31 = 187.31 : x
2. Step 2: Convert to fraction form
   123.19/187.31 = 187.31/x
3. Step 3: Cross multiply
   123.19x = 187.31 × 187.31
4. Step 4: Simplify right side
   123.19x = 35,085.97
5. Step 5: Solve for x
   x = 35,085.97/123.19
6. Step 6: Final answer
   x = 284.82