Finding the Third Proportional to 404,478 and 877,711.50

Step by Step Solution

1. Step 1: Write the proportion equation
   404,478 : 877,711.50 = 877,711.50 : x
2. Step 2: Convert to fraction form
   404,478/877,711.50 = 877,711.50/x
3. Step 3: Cross multiply
   404,478x = 877,711.50 × 877,711.50
4. Step 4: Simplify right side
   404,478x = 770,377,477,232.25
5. Step 5: Solve for x
   x = 770,377,477,232.25/404,478
6. Step 6: Final answer
   x = 1,904,621.46