Finding the Fourth Proportional to 1,578.55, 2,365.21 and 960.38

Step by Step Solution

1. Step 1: Write the proportion equation
   1,578.55 : 2,365.21 = 960.38 : x
2. Step 2: Convert to fraction form
   1,578.55/2,365.21 = 960.38/x
3. Step 3: Cross multiply
   1,578.55x = 2,365.21 × 960.38
4. Step 4: Simplify right side
   1,578.55x = 2,271,503.89
5. Step 5: Solve for x
   x = 2,271,503.89/1,578.55
6. Step 6: Final answer
   x = 1,438.98