Finding the Fourth Proportional to 2,883.03, 3,978.50 and 2,100.39

Step by Step Solution

1. Step 1: Write the proportion equation
   2,883.03 : 3,978.50 = 2,100.39 : x
2. Step 2: Convert to fraction form
   2,883.03/3,978.50 = 2,100.39/x
3. Step 3: Cross multiply
   2,883.03x = 3,978.50 × 2,100.39
4. Step 4: Simplify right side
   2,883.03x = 8,356,391.11
5. Step 5: Solve for x
   x = 8,356,391.11/2,883.03
6. Step 6: Final answer
   x = 2,898.48