Finding the Third Proportional to 131.88 and 235.56

Step by Step Solution

1. Step 1: Write the proportion equation
   131.88 : 235.56 = 235.56 : x
2. Step 2: Convert to fraction form
   131.88/235.56 = 235.56/x
3. Step 3: Cross multiply
   131.88x = 235.56 × 235.56
4. Step 4: Simplify right side
   131.88x = 55,489.69
5. Step 5: Solve for x
   x = 55,489.69/131.88
6. Step 6: Final answer
   x = 420.77