Finding the Third Proportional to 250.17 and 392.48

Step by Step Solution

1. Step 1: Write the proportion equation
   250.17 : 392.48 = 392.48 : x
2. Step 2: Convert to fraction form
   250.17/392.48 = 392.48/x
3. Step 3: Cross multiply
   250.17x = 392.48 × 392.48
4. Step 4: Simplify right side
   250.17x = 154,043.98
5. Step 5: Solve for x
   x = 154,043.98/250.17
6. Step 6: Final answer
   x = 615.75