Finding the Fourth Proportional to 1,419.36, 1,958.72 and 789.93

Step by Step Solution

1. Step 1: Write the proportion equation
   1,419.36 : 1,958.72 = 789.93 : x
2. Step 2: Convert to fraction form
   1,419.36/1,958.72 = 789.93/x
3. Step 3: Cross multiply
   1,419.36x = 1,958.72 × 789.93
4. Step 4: Simplify right side
   1,419.36x = 1,547,237.95
5. Step 5: Solve for x
   x = 1,547,237.95/1,419.36
6. Step 6: Final answer
   x = 1,090.10