Finding the Third Proportional to 1,405,876 and 2,178,726

Step by Step Solution

1. Step 1: Write the proportion equation
   1,405,876 : 2,178,726 = 2,178,726 : x
2. Step 2: Convert to fraction form
   1,405,876/2,178,726 = 2,178,726/x
3. Step 3: Cross multiply
   1,405,876x = 2,178,726 × 2,178,726
4. Step 4: Simplify right side
   1,405,876x = 4,746,846,983,076
5. Step 5: Solve for x
   x = 4,746,846,983,076/1,405,876
6. Step 6: Final answer
   x = 3,376,433.61