Finding the Fourth Proportional to 2,551.32, 3,827.40 and 819.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,551.32 : 3,827.40 = 819.72 : x
2. Step 2: Convert to fraction form
   2,551.32/3,827.40 = 819.72/x
3. Step 3: Cross multiply
   2,551.32x = 3,827.40 × 819.72
4. Step 4: Simplify right side
   2,551.32x = 3,137,396.33
5. Step 5: Solve for x
   x = 3,137,396.33/2,551.32
6. Step 6: Final answer
   x = 1,229.71