Finding the Third Proportional to 1,678,860 and 2,670,003

Step by Step Solution

1. Step 1: Write the proportion equation
   1,678,860 : 2,670,003 = 2,670,003 : x
2. Step 2: Convert to fraction form
   1,678,860/2,670,003 = 2,670,003/x
3. Step 3: Cross multiply
   1,678,860x = 2,670,003 × 2,670,003
4. Step 4: Simplify right side
   1,678,860x = 7,128,916,020,009
5. Step 5: Solve for x
   x = 7,128,916,020,009/1,678,860
6. Step 6: Final answer
   x = 4,246,283.80