Finding the Fourth Proportional to 1,434,139.11, 1,979,036.81 and 789,433.38

Step by Step Solution

1. Step 1: Write the proportion equation
   1,434,139.11 : 1,979,036.81 = 789,433.38 : x
2. Step 2: Convert to fraction form
   1,434,139.11/1,979,036.81 = 789,433.38/x
3. Step 3: Cross multiply
   1,434,139.11x = 1,979,036.81 × 789,433.38
4. Step 4: Simplify right side
   1,434,139.11x = 1,562,317,718,062.72
5. Step 5: Solve for x
   x = 1,562,317,718,062.72/1,434,139.11
6. Step 6: Final answer
   x = 1,089,376.69