Finding the Fourth Proportional to 1,920.72, 2,881.89 and 946.83

Step by Step Solution

1. Step 1: Write the proportion equation
   1,920.72 : 2,881.89 = 946.83 : x
2. Step 2: Convert to fraction form
   1,920.72/2,881.89 = 946.83/x
3. Step 3: Cross multiply
   1,920.72x = 2,881.89 × 946.83
4. Step 4: Simplify right side
   1,920.72x = 2,728,659.91
5. Step 5: Solve for x
   x = 2,728,659.91/1,920.72
6. Step 6: Final answer
   x = 1,420.64