Finding the Third Proportional to 1,039,710 and 1,390,725

Step by Step Solution

1. Step 1: Write the proportion equation
   1,039,710 : 1,390,725 = 1,390,725 : x
2. Step 2: Convert to fraction form
   1,039,710/1,390,725 = 1,390,725/x
3. Step 3: Cross multiply
   1,039,710x = 1,390,725 × 1,390,725
4. Step 4: Simplify right side
   1,039,710x = 1,934,116,025,625
5. Step 5: Solve for x
   x = 1,934,116,025,625/1,039,710
6. Step 6: Final answer
   x = 1,860,245.67