Finding the Third Proportional to 400,445.25 and 851,758.50

Step by Step Solution

1. Step 1: Write the proportion equation
   400,445.25 : 851,758.50 = 851,758.50 : x
2. Step 2: Convert to fraction form
   400,445.25/851,758.50 = 851,758.50/x
3. Step 3: Cross multiply
   400,445.25x = 851,758.50 × 851,758.50
4. Step 4: Simplify right side
   400,445.25x = 725,492,542,322.25
5. Step 5: Solve for x
   x = 725,492,542,322.25/400,445.25
6. Step 6: Final answer
   x = 1,811,714.69