Finding the Third Proportional to 1,243,379 and 1,869,684

Step by Step Solution

1. Step 1: Write the proportion equation
   1,243,379 : 1,869,684 = 1,869,684 : x
2. Step 2: Convert to fraction form
   1,243,379/1,869,684 = 1,869,684/x
3. Step 3: Cross multiply
   1,243,379x = 1,869,684 × 1,869,684
4. Step 4: Simplify right side
   1,243,379x = 3,495,718,259,856
5. Step 5: Solve for x
   x = 3,495,718,259,856/1,243,379
6. Step 6: Final answer
   x = 2,811,466.38