Finding the Fourth Proportional to 2,815.32, 4,223.58 and 1,254.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,815.32 : 4,223.58 = 1,254.72 : x
2. Step 2: Convert to fraction form
   2,815.32/4,223.58 = 1,254.72/x
3. Step 3: Cross multiply
   2,815.32x = 4,223.58 × 1,254.72
4. Step 4: Simplify right side
   2,815.32x = 5,299,410.30
5. Step 5: Solve for x
   x = 5,299,410.30/2,815.32
6. Step 6: Final answer
   x = 1,882.35