Finding the Fourth Proportional to 1,920.16, 2,879.52 and 946.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,920.16 : 2,879.52 = 946.72 : x
2. Step 2: Convert to fraction form
   1,920.16/2,879.52 = 946.72/x
3. Step 3: Cross multiply
   1,920.16x = 2,879.52 × 946.72
4. Step 4: Simplify right side
   1,920.16x = 2,726,099.17
5. Step 5: Solve for x
   x = 2,726,099.17/1,920.16
6. Step 6: Final answer
   x = 1,419.73