Finding the Third Proportional to 394,498 and 862,805.50

Step by Step Solution

1. Step 1: Write the proportion equation
   394,498 : 862,805.50 = 862,805.50 : x
2. Step 2: Convert to fraction form
   394,498/862,805.50 = 862,805.50/x
3. Step 3: Cross multiply
   394,498x = 862,805.50 × 862,805.50
4. Step 4: Simplify right side
   394,498x = 744,433,330,830.25
5. Step 5: Solve for x
   x = 744,433,330,830.25/394,498
6. Step 6: Final answer
   x = 1,887,039.56