Finding the Fourth Proportional to 1,284,687.90, 1,772,066.62 and 826,399.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,284,687.90 : 1,772,066.62 = 826,399.31 : x
2. Step 2: Convert to fraction form
   1,284,687.90/1,772,066.62 = 826,399.31/x
3. Step 3: Cross multiply
   1,284,687.90x = 1,772,066.62 × 826,399.31
4. Step 4: Simplify right side
   1,284,687.90x = 1,464,434,627,910.04
5. Step 5: Solve for x
   x = 1,464,434,627,910.04/1,284,687.90
6. Step 6: Final answer
   x = 1,139,914.71