Finding the Third Proportional to 1,217,784 and 1,855,386

Step by Step Solution

1. Step 1: Write the proportion equation
   1,217,784 : 1,855,386 = 1,855,386 : x
2. Step 2: Convert to fraction form
   1,217,784/1,855,386 = 1,855,386/x
3. Step 3: Cross multiply
   1,217,784x = 1,855,386 × 1,855,386
4. Step 4: Simplify right side
   1,217,784x = 3,442,457,208,996
5. Step 5: Solve for x
   x = 3,442,457,208,996/1,217,784
6. Step 6: Final answer
   x = 2,826,820.86