Finding the Third Proportional to 90.94 and 140.88

Step by Step Solution

1. Step 1: Write the proportion equation
   90.94 : 140.88 = 140.88 : x
2. Step 2: Convert to fraction form
   90.94/140.88 = 140.88/x
3. Step 3: Cross multiply
   90.94x = 140.88 × 140.88
4. Step 4: Simplify right side
   90.94x = 19,845.77
5. Step 5: Solve for x
   x = 19,845.77/90.94
6. Step 6: Final answer
   x = 218.24