Finding the Fourth Proportional to 1,383,518, 1,909,284 and 779,906

Step by Step Solution

1. Step 1: Write the proportion equation
   1,383,518 : 1,909,284 = 779,906 : x
2. Step 2: Convert to fraction form
   1,383,518/1,909,284 = 779,906/x
3. Step 3: Cross multiply
   1,383,518x = 1,909,284 × 779,906
4. Step 4: Simplify right side
   1,383,518x = 1,489,062,047,304
5. Step 5: Solve for x
   x = 1,489,062,047,304/1,383,518
6. Step 6: Final answer
   x = 1,076,286.72