Finding the Fourth Proportional to 2,820.76, 3,892.56 and 1,813.39

Step by Step Solution

1. Step 1: Write the proportion equation
   2,820.76 : 3,892.56 = 1,813.39 : x
2. Step 2: Convert to fraction form
   2,820.76/3,892.56 = 1,813.39/x
3. Step 3: Cross multiply
   2,820.76x = 3,892.56 × 1,813.39
4. Step 4: Simplify right side
   2,820.76x = 7,058,712.85
5. Step 5: Solve for x
   x = 7,058,712.85/2,820.76
6. Step 6: Final answer
   x = 2,502.42