Finding the Fourth Proportional to 2,863.10, 3,942.30 and 2,156

Step by Step Solution

1. Step 1: Write the proportion equation
   2,863.10 : 3,942.30 = 2,156 : x
2. Step 2: Convert to fraction form
   2,863.10/3,942.30 = 2,156/x
3. Step 3: Cross multiply
   2,863.10x = 3,942.30 × 2,156
4. Step 4: Simplify right side
   2,863.10x = 8,499,598.80
5. Step 5: Solve for x
   x = 8,499,598.80/2,863.10
6. Step 6: Final answer
   x = 2,968.67