Finding the Fourth Proportional to 2,884.59, 3,978.88 and 1,820.48

Step by Step Solution

1. Step 1: Write the proportion equation
   2,884.59 : 3,978.88 = 1,820.48 : x
2. Step 2: Convert to fraction form
   2,884.59/3,978.88 = 1,820.48/x
3. Step 3: Cross multiply
   2,884.59x = 3,978.88 × 1,820.48
4. Step 4: Simplify right side
   2,884.59x = 7,243,451.57
5. Step 5: Solve for x
   x = 7,243,451.57/2,884.59
6. Step 6: Final answer
   x = 2,511.09