Finding the Third Proportional to 907,410 and 1,392,840

Step by Step Solution

1. Step 1: Write the proportion equation
   907,410 : 1,392,840 = 1,392,840 : x
2. Step 2: Convert to fraction form
   907,410/1,392,840 = 1,392,840/x
3. Step 3: Cross multiply
   907,410x = 1,392,840 × 1,392,840
4. Step 4: Simplify right side
   907,410x = 1,940,003,265,600
5. Step 5: Solve for x
   x = 1,940,003,265,600/907,410
6. Step 6: Final answer
   x = 2,137,956.67