Finding the Fourth Proportional to 1,419.37, 1,958.71 and 789.88

Step by Step Solution

1. Step 1: Write the proportion equation
   1,419.37 : 1,958.71 = 789.88 : x
2. Step 2: Convert to fraction form
   1,419.37/1,958.71 = 789.88/x
3. Step 3: Cross multiply
   1,419.37x = 1,958.71 × 789.88
4. Step 4: Simplify right side
   1,419.37x = 1,547,138.98
5. Step 5: Solve for x
   x = 1,547,138.98/1,419.37
6. Step 6: Final answer
   x = 1,090.02