Finding the Third Proportional to 153,923 and 245,890

Step by Step Solution

1. Step 1: Write the proportion equation
   153,923 : 245,890 = 245,890 : x
2. Step 2: Convert to fraction form
   153,923/245,890 = 245,890/x
3. Step 3: Cross multiply
   153,923x = 245,890 × 245,890
4. Step 4: Simplify right side
   153,923x = 60,461,892,100
5. Step 5: Solve for x
   x = 60,461,892,100/153,923
6. Step 6: Final answer
   x = 392,806.09