Finding the Third Proportional to 774,798 and 1,678,280

Step by Step Solution

1. Step 1: Write the proportion equation
   774,798 : 1,678,280 = 1,678,280 : x
2. Step 2: Convert to fraction form
   774,798/1,678,280 = 1,678,280/x
3. Step 3: Cross multiply
   774,798x = 1,678,280 × 1,678,280
4. Step 4: Simplify right side
   774,798x = 2,816,623,758,400
5. Step 5: Solve for x
   x = 2,816,623,758,400/774,798
6. Step 6: Final answer
   x = 3,635,300.76