Finding the Fourth Proportional to 2,551.30, 3,826.05 and 819.34

Step by Step Solution

1. Step 1: Write the proportion equation
   2,551.30 : 3,826.05 = 819.34 : x
2. Step 2: Convert to fraction form
   2,551.30/3,826.05 = 819.34/x
3. Step 3: Cross multiply
   2,551.30x = 3,826.05 × 819.34
4. Step 4: Simplify right side
   2,551.30x = 3,134,835.81
5. Step 5: Solve for x
   x = 3,134,835.81/2,551.30
6. Step 6: Final answer
   x = 1,228.72