Finding the Fourth Proportional to 2,871.79, 4,307.51 and 923.83

Step by Step Solution

1. Step 1: Write the proportion equation
   2,871.79 : 4,307.51 = 923.83 : x
2. Step 2: Convert to fraction form
   2,871.79/4,307.51 = 923.83/x
3. Step 3: Cross multiply
   2,871.79x = 4,307.51 × 923.83
4. Step 4: Simplify right side
   2,871.79x = 3,979,398.50
5. Step 5: Solve for x
   x = 3,979,398.50/2,871.79
6. Step 6: Final answer
   x = 1,385.69