Finding the Third Proportional to 1,242,113 and 1,869,389

Step by Step Solution

1. Step 1: Write the proportion equation
   1,242,113 : 1,869,389 = 1,869,389 : x
2. Step 2: Convert to fraction form
   1,242,113/1,869,389 = 1,869,389/x
3. Step 3: Cross multiply
   1,242,113x = 1,869,389 × 1,869,389
4. Step 4: Simplify right side
   1,242,113x = 3,494,615,233,321
5. Step 5: Solve for x
   x = 3,494,615,233,321/1,242,113
6. Step 6: Final answer
   x = 2,813,443.89