Finding the Third Proportional to 396,776 and 603,467.50

Step by Step Solution

1. Step 1: Write the proportion equation
   396,776 : 603,467.50 = 603,467.50 : x
2. Step 2: Convert to fraction form
   396,776/603,467.50 = 603,467.50/x
3. Step 3: Cross multiply
   396,776x = 603,467.50 × 603,467.50
4. Step 4: Simplify right side
   396,776x = 364,173,023,556.25
5. Step 5: Solve for x
   x = 364,173,023,556.25/396,776
6. Step 6: Final answer
   x = 917,830.27