Finding the Fourth Proportional to 1,418.58, 1,957.76 and 789.22

Step by Step Solution

1. Step 1: Write the proportion equation
   1,418.58 : 1,957.76 = 789.22 : x
2. Step 2: Convert to fraction form
   1,418.58/1,957.76 = 789.22/x
3. Step 3: Cross multiply
   1,418.58x = 1,957.76 × 789.22
4. Step 4: Simplify right side
   1,418.58x = 1,545,099.40
5. Step 5: Solve for x
   x = 1,545,099.40/1,418.58
6. Step 6: Final answer
   x = 1,089.19