Finding the Fourth Proportional to 1,410.24, 1,945.92 and 789.12

Step by Step Solution

1. Step 1: Write the proportion equation
   1,410.24 : 1,945.92 = 789.12 : x
2. Step 2: Convert to fraction form
   1,410.24/1,945.92 = 789.12/x
3. Step 3: Cross multiply
   1,410.24x = 1,945.92 × 789.12
4. Step 4: Simplify right side
   1,410.24x = 1,535,564.39
5. Step 5: Solve for x
   x = 1,535,564.39/1,410.24
6. Step 6: Final answer
   x = 1,088.87