Finding the Third Proportional to 1,258,470 and 1,887,840

Step by Step Solution

1. Step 1: Write the proportion equation
   1,258,470 : 1,887,840 = 1,887,840 : x
2. Step 2: Convert to fraction form
   1,258,470/1,887,840 = 1,887,840/x
3. Step 3: Cross multiply
   1,258,470x = 1,887,840 × 1,887,840
4. Step 4: Simplify right side
   1,258,470x = 3,563,939,865,600
5. Step 5: Solve for x
   x = 3,563,939,865,600/1,258,470
6. Step 6: Final answer
   x = 2,831,962.51