Finding the Third Proportional to 140.91 and 223.59

Step by Step Solution

1. Step 1: Write the proportion equation
   140.91 : 223.59 = 223.59 : x
2. Step 2: Convert to fraction form
   140.91/223.59 = 223.59/x
3. Step 3: Cross multiply
   140.91x = 223.59 × 223.59
4. Step 4: Simplify right side
   140.91x = 49,994.17
5. Step 5: Solve for x
   x = 49,994.17/140.91
6. Step 6: Final answer
   x = 354.80