Finding the Third Proportional to 409,504 and 878,300

Step by Step Solution

1. Step 1: Write the proportion equation
   409,504 : 878,300 = 878,300 : x
2. Step 2: Convert to fraction form
   409,504/878,300 = 878,300/x
3. Step 3: Cross multiply
   409,504x = 878,300 × 878,300
4. Step 4: Simplify right side
   409,504x = 771,410,890,000
5. Step 5: Solve for x
   x = 771,410,890,000/409,504
6. Step 6: Final answer
   x = 1,883,768.88