Finding the Third Proportional to 907,418 and 1,392,851

Step by Step Solution

1. Step 1: Write the proportion equation
   907,418 : 1,392,851 = 1,392,851 : x
2. Step 2: Convert to fraction form
   907,418/1,392,851 = 1,392,851/x
3. Step 3: Cross multiply
   907,418x = 1,392,851 × 1,392,851
4. Step 4: Simplify right side
   907,418x = 1,940,033,908,201
5. Step 5: Solve for x
   x = 1,940,033,908,201/907,418
6. Step 6: Final answer
   x = 2,137,971.59