Finding the Third Proportional to 386,424 and 837,168.75

Step by Step Solution

1. Step 1: Write the proportion equation
   386,424 : 837,168.75 = 837,168.75 : x
2. Step 2: Convert to fraction form
   386,424/837,168.75 = 837,168.75/x
3. Step 3: Cross multiply
   386,424x = 837,168.75 × 837,168.75
4. Step 4: Simplify right side
   386,424x = 700,851,515,976.56
5. Step 5: Solve for x
   x = 700,851,515,976.56/386,424
6. Step 6: Final answer
   x = 1,813,685.27