Finding the Fourth Proportional to 2,871.92, 4,308.72 and 924.08

Step by Step Solution

1. Step 1: Write the proportion equation
   2,871.92 : 4,308.72 = 924.08 : x
2. Step 2: Convert to fraction form
   2,871.92/4,308.72 = 924.08/x
3. Step 3: Cross multiply
   2,871.92x = 4,308.72 × 924.08
4. Step 4: Simplify right side
   2,871.92x = 3,981,601.98
5. Step 5: Solve for x
   x = 3,981,601.98/2,871.92
6. Step 6: Final answer
   x = 1,386.39