Finding the Third Proportional to 1,243,412 and 1,857,415

Step by Step Solution

1. Step 1: Write the proportion equation
   1,243,412 : 1,857,415 = 1,857,415 : x
2. Step 2: Convert to fraction form
   1,243,412/1,857,415 = 1,857,415/x
3. Step 3: Cross multiply
   1,243,412x = 1,857,415 × 1,857,415
4. Step 4: Simplify right side
   1,243,412x = 3,449,990,482,225
5. Step 5: Solve for x
   x = 3,449,990,482,225/1,243,412
6. Step 6: Final answer
   x = 2,774,615.72