Finding the Fourth Proportional to 2,116.96, 3,176.34 and 819.34

Step by Step Solution

1. Step 1: Write the proportion equation
   2,116.96 : 3,176.34 = 819.34 : x
2. Step 2: Convert to fraction form
   2,116.96/3,176.34 = 819.34/x
3. Step 3: Cross multiply
   2,116.96x = 3,176.34 × 819.34
4. Step 4: Simplify right side
   2,116.96x = 2,602,502.42
5. Step 5: Solve for x
   x = 2,602,502.42/2,116.96
6. Step 6: Final answer
   x = 1,229.36