Finding the Fourth Proportional to 1,419.32, 1,958.76 and 789.99

Step by Step Solution

1. Step 1: Write the proportion equation
   1,419.32 : 1,958.76 = 789.99 : x
2. Step 2: Convert to fraction form
   1,419.32/1,958.76 = 789.99/x
3. Step 3: Cross multiply
   1,419.32x = 1,958.76 × 789.99
4. Step 4: Simplify right side
   1,419.32x = 1,547,400.81
5. Step 5: Solve for x
   x = 1,547,400.81/1,419.32
6. Step 6: Final answer
   x = 1,090.24