Finding the Third Proportional to 478,404 and 770,826

Step by Step Solution

1. Step 1: Write the proportion equation
   478,404 : 770,826 = 770,826 : x
2. Step 2: Convert to fraction form
   478,404/770,826 = 770,826/x
3. Step 3: Cross multiply
   478,404x = 770,826 × 770,826
4. Step 4: Simplify right side
   478,404x = 594,172,722,276
5. Step 5: Solve for x
   x = 594,172,722,276/478,404
6. Step 6: Final answer
   x = 1,241,989.45