Finding the Fourth Proportional to 2,820.16, 3,890.48 and 1,826.32

Step by Step Solution

1. Step 1: Write the proportion equation
   2,820.16 : 3,890.48 = 1,826.32 : x
2. Step 2: Convert to fraction form
   2,820.16/3,890.48 = 1,826.32/x
3. Step 3: Cross multiply
   2,820.16x = 3,890.48 × 1,826.32
4. Step 4: Simplify right side
   2,820.16x = 7,105,261.43
5. Step 5: Solve for x
   x = 7,105,261.43/2,820.16
6. Step 6: Final answer
   x = 2,519.45