Finding the Fourth Proportional to 1,716.30, 2,572.46 and 789.91

Step by Step Solution

1. Step 1: Write the proportion equation
   1,716.30 : 2,572.46 = 789.91 : x
2. Step 2: Convert to fraction form
   1,716.30/2,572.46 = 789.91/x
3. Step 3: Cross multiply
   1,716.30x = 2,572.46 × 789.91
4. Step 4: Simplify right side
   1,716.30x = 2,032,009.90
5. Step 5: Solve for x
   x = 2,032,009.90/1,716.30
6. Step 6: Final answer
   x = 1,183.95