Finding the Third Proportional to 393,112.50 and 859,834.50

Step by Step Solution

1. Step 1: Write the proportion equation
   393,112.50 : 859,834.50 = 859,834.50 : x
2. Step 2: Convert to fraction form
   393,112.50/859,834.50 = 859,834.50/x
3. Step 3: Cross multiply
   393,112.50x = 859,834.50 × 859,834.50
4. Step 4: Simplify right side
   393,112.50x = 739,315,367,390.25
5. Step 5: Solve for x
   x = 739,315,367,390.25/393,112.50
6. Step 6: Final answer
   x = 1,880,671.23