Finding the Third Proportional to 1,403,640 and 2,007,258

Step by Step Solution

1. Step 1: Write the proportion equation
   1,403,640 : 2,007,258 = 2,007,258 : x
2. Step 2: Convert to fraction form
   1,403,640/2,007,258 = 2,007,258/x
3. Step 3: Cross multiply
   1,403,640x = 2,007,258 × 2,007,258
4. Step 4: Simplify right side
   1,403,640x = 4,029,084,678,564
5. Step 5: Solve for x
   x = 4,029,084,678,564/1,403,640
6. Step 6: Final answer
   x = 2,870,454.45