Finding the Third Proportional to 1,311,440 and 2,085,312

Step by Step Solution

1. Step 1: Write the proportion equation
   1,311,440 : 2,085,312 = 2,085,312 : x
2. Step 2: Convert to fraction form
   1,311,440/2,085,312 = 2,085,312/x
3. Step 3: Cross multiply
   1,311,440x = 2,085,312 × 2,085,312
4. Step 4: Simplify right side
   1,311,440x = 4,348,526,137,344
5. Step 5: Solve for x
   x = 4,348,526,137,344/1,311,440
6. Step 6: Final answer
   x = 3,315,840.71