Finding the Fourth Proportional to 1,045,666, 1,568,499 and 257,698

Step by Step Solution

1. Step 1: Write the proportion equation
   1,045,666 : 1,568,499 = 257,698 : x
2. Step 2: Convert to fraction form
   1,045,666/1,568,499 = 257,698/x
3. Step 3: Cross multiply
   1,045,666x = 1,568,499 × 257,698
4. Step 4: Simplify right side
   1,045,666x = 404,199,055,302
5. Step 5: Solve for x
   x = 404,199,055,302/1,045,666
6. Step 6: Final answer
   x = 386,547