Finding the Third Proportional to 407,190 and 877,489.50

Step by Step Solution

1. Step 1: Write the proportion equation
   407,190 : 877,489.50 = 877,489.50 : x
2. Step 2: Convert to fraction form
   407,190/877,489.50 = 877,489.50/x
3. Step 3: Cross multiply
   407,190x = 877,489.50 × 877,489.50
4. Step 4: Simplify right side
   407,190x = 769,987,822,610.25
5. Step 5: Solve for x
   x = 769,987,822,610.25/407,190
6. Step 6: Final answer
   x = 1,890,979.21