Finding the Fourth Proportional to 2,100.20, 2,889.68 and 1,819.58

Step by Step Solution

1. Step 1: Write the proportion equation
   2,100.20 : 2,889.68 = 1,819.58 : x
2. Step 2: Convert to fraction form
   2,100.20/2,889.68 = 1,819.58/x
3. Step 3: Cross multiply
   2,100.20x = 2,889.68 × 1,819.58
4. Step 4: Simplify right side
   2,100.20x = 5,258,003.93
5. Step 5: Solve for x
   x = 5,258,003.93/2,100.20
6. Step 6: Final answer
   x = 2,503.57