Finding the Third Proportional to 1,376,640 and 2,085,680

Step by Step Solution

1. Step 1: Write the proportion equation
   1,376,640 : 2,085,680 = 2,085,680 : x
2. Step 2: Convert to fraction form
   1,376,640/2,085,680 = 2,085,680/x
3. Step 3: Cross multiply
   1,376,640x = 2,085,680 × 2,085,680
4. Step 4: Simplify right side
   1,376,640x = 4,350,061,062,400
5. Step 5: Solve for x
   x = 4,350,061,062,400/1,376,640
6. Step 6: Final answer
   x = 3,159,911.86