Finding the Third Proportional to 1,243,409 and 1,857,410

Step by Step Solution

1. Step 1: Write the proportion equation
   1,243,409 : 1,857,410 = 1,857,410 : x
2. Step 2: Convert to fraction form
   1,243,409/1,857,410 = 1,857,410/x
3. Step 3: Cross multiply
   1,243,409x = 1,857,410 × 1,857,410
4. Step 4: Simplify right side
   1,243,409x = 3,449,971,908,100
5. Step 5: Solve for x
   x = 3,449,971,908,100/1,243,409
6. Step 6: Final answer
   x = 2,774,607.48