Finding the Fourth Proportional to 1,418.55, 1,957.50 and 789.06

Step by Step Solution

1. Step 1: Write the proportion equation
   1,418.55 : 1,957.50 = 789.06 : x
2. Step 2: Convert to fraction form
   1,418.55/1,957.50 = 789.06/x
3. Step 3: Cross multiply
   1,418.55x = 1,957.50 × 789.06
4. Step 4: Simplify right side
   1,418.55x = 1,544,584.95
5. Step 5: Solve for x
   x = 1,544,584.95/1,418.55
6. Step 6: Final answer
   x = 1,088.85