Finding the Third Proportional to 343,139 and 495,023.25

Step by Step Solution

1. Step 1: Write the proportion equation
   343,139 : 495,023.25 = 495,023.25 : x
2. Step 2: Convert to fraction form
   343,139/495,023.25 = 495,023.25/x
3. Step 3: Cross multiply
   343,139x = 495,023.25 × 495,023.25
4. Step 4: Simplify right side
   343,139x = 245,048,018,040.56
5. Step 5: Solve for x
   x = 245,048,018,040.56/343,139
6. Step 6: Final answer
   x = 714,136.31