Finding the Third Proportional to 907,396 and 1,392,818

Step by Step Solution

1. Step 1: Write the proportion equation
   907,396 : 1,392,818 = 1,392,818 : x
2. Step 2: Convert to fraction form
   907,396/1,392,818 = 1,392,818/x
3. Step 3: Cross multiply
   907,396x = 1,392,818 × 1,392,818
4. Step 4: Simplify right side
   907,396x = 1,939,941,981,124
5. Step 5: Solve for x
   x = 1,939,941,981,124/907,396
6. Step 6: Final answer
   x = 2,137,922.12