Finding the Third Proportional to 400,855.50 and 834,880.50

Step by Step Solution

1. Step 1: Write the proportion equation
   400,855.50 : 834,880.50 = 834,880.50 : x
2. Step 2: Convert to fraction form
   400,855.50/834,880.50 = 834,880.50/x
3. Step 3: Cross multiply
   400,855.50x = 834,880.50 × 834,880.50
4. Step 4: Simplify right side
   400,855.50x = 697,025,449,280.25
5. Step 5: Solve for x
   x = 697,025,449,280.25/400,855.50
6. Step 6: Final answer
   x = 1,738,844.67