Finding the Third Proportional to 939,132 and 1,258,128

Step by Step Solution

1. Step 1: Write the proportion equation
   939,132 : 1,258,128 = 1,258,128 : x
2. Step 2: Convert to fraction form
   939,132/1,258,128 = 1,258,128/x
3. Step 3: Cross multiply
   939,132x = 1,258,128 × 1,258,128
4. Step 4: Simplify right side
   939,132x = 1,582,886,064,384
5. Step 5: Solve for x
   x = 1,582,886,064,384/939,132
6. Step 6: Final answer
   x = 1,685,477.72