Finding the Third Proportional to 398,742 and 874,990.50

Step by Step Solution

1. Step 1: Write the proportion equation
   398,742 : 874,990.50 = 874,990.50 : x
2. Step 2: Convert to fraction form
   398,742/874,990.50 = 874,990.50/x
3. Step 3: Cross multiply
   398,742x = 874,990.50 × 874,990.50
4. Step 4: Simplify right side
   398,742x = 765,608,375,090.25
5. Step 5: Solve for x
   x = 765,608,375,090.25/398,742
6. Step 6: Final answer
   x = 1,920,059.52