Finding the Fourth Proportional to 2,820.18, 3,892.05 and 1,641.54

Step by Step Solution

1. Step 1: Write the proportion equation
   2,820.18 : 3,892.05 = 1,641.54 : x
2. Step 2: Convert to fraction form
   2,820.18/3,892.05 = 1,641.54/x
3. Step 3: Cross multiply
   2,820.18x = 3,892.05 × 1,641.54
4. Step 4: Simplify right side
   2,820.18x = 6,388,955.76
5. Step 5: Solve for x
   x = 6,388,955.76/2,820.18
6. Step 6: Final answer
   x = 2,265.44