Finding the Fourth Proportional to 1,521.57, 2,278.25 and 789.62

Step by Step Solution

1. Step 1: Write the proportion equation
   1,521.57 : 2,278.25 = 789.62 : x
2. Step 2: Convert to fraction form
   1,521.57/2,278.25 = 789.62/x
3. Step 3: Cross multiply
   1,521.57x = 2,278.25 × 789.62
4. Step 4: Simplify right side
   1,521.57x = 1,798,936.43
5. Step 5: Solve for x
   x = 1,798,936.43/1,521.57
6. Step 6: Final answer
   x = 1,182.29