Finding the Third Proportional to 907,405 and 1,392,831

Step by Step Solution

1. Step 1: Write the proportion equation
   907,405 : 1,392,831 = 1,392,831 : x
2. Step 2: Convert to fraction form
   907,405/1,392,831 = 1,392,831/x
3. Step 3: Cross multiply
   907,405x = 1,392,831 × 1,392,831
4. Step 4: Simplify right side
   907,405x = 1,939,978,194,561
5. Step 5: Solve for x
   x = 1,939,978,194,561/907,405
6. Step 6: Final answer
   x = 2,137,940.83