Finding the Fourth Proportional to 2,819.33, 3,888.30 and 2,112.83

Step by Step Solution

1. Step 1: Write the proportion equation
   2,819.33 : 3,888.30 = 2,112.83 : x
2. Step 2: Convert to fraction form
   2,819.33/3,888.30 = 2,112.83/x
3. Step 3: Cross multiply
   2,819.33x = 3,888.30 × 2,112.83
4. Step 4: Simplify right side
   2,819.33x = 8,215,316.89
5. Step 5: Solve for x
   x = 8,215,316.89/2,819.33
6. Step 6: Final answer
   x = 2,913.93