Finding the Third Proportional to 130.50 and 285.38

Step by Step Solution

1. Step 1: Write the proportion equation
   130.50 : 285.38 = 285.38 : x
2. Step 2: Convert to fraction form
   130.50/285.38 = 285.38/x
3. Step 3: Cross multiply
   130.50x = 285.38 × 285.38
4. Step 4: Simplify right side
   130.50x = 81,438.89
5. Step 5: Solve for x
   x = 81,438.89/130.50
6. Step 6: Final answer
   x = 624.05