Finding the Third Proportional to 155,331 and 317,182.50

Step by Step Solution

1. Step 1: Write the proportion equation
   155,331 : 317,182.50 = 317,182.50 : x
2. Step 2: Convert to fraction form
   155,331/317,182.50 = 317,182.50/x
3. Step 3: Cross multiply
   155,331x = 317,182.50 × 317,182.50
4. Step 4: Simplify right side
   155,331x = 100,604,738,306.25
5. Step 5: Solve for x
   x = 100,604,738,306.25/155,331
6. Step 6: Final answer
   x = 647,679.72