Finding the Fourth Proportional to 1,433,782.88, 1,978,604.76 and 789,189.20

Step by Step Solution

1. Step 1: Write the proportion equation
   1,433,782.88 : 1,978,604.76 = 789,189.20 : x
2. Step 2: Convert to fraction form
   1,433,782.88/1,978,604.76 = 789,189.20/x
3. Step 3: Cross multiply
   1,433,782.88x = 1,978,604.76 × 789,189.20
4. Step 4: Simplify right side
   1,433,782.88x = 1,561,493,507,660.59
5. Step 5: Solve for x
   x = 1,561,493,507,660.59/1,433,782.88
6. Step 6: Final answer
   x = 1,089,072.50