Finding the Third Proportional to 315,471 and 688,036.50

Step by Step Solution

1. Step 1: Write the proportion equation
   315,471 : 688,036.50 = 688,036.50 : x
2. Step 2: Convert to fraction form
   315,471/688,036.50 = 688,036.50/x
3. Step 3: Cross multiply
   315,471x = 688,036.50 × 688,036.50
4. Step 4: Simplify right side
   315,471x = 473,394,225,332.25
5. Step 5: Solve for x
   x = 473,394,225,332.25/315,471
6. Step 6: Final answer
   x = 1,500,595.06