Finding the Fourth Proportional to 1,078.72, 1,616.80 and 950.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,078.72 : 1,616.80 = 950.72 : x
2. Step 2: Convert to fraction form
   1,078.72/1,616.80 = 950.72/x
3. Step 3: Cross multiply
   1,078.72x = 1,616.80 × 950.72
4. Step 4: Simplify right side
   1,078.72x = 1,537,124.10
5. Step 5: Solve for x
   x = 1,537,124.10/1,078.72
6. Step 6: Final answer
   x = 1,424.95