Finding the Fourth Proportional to 2,820.84, 3,890.37 and 2,114.34

Step by Step Solution

1. Step 1: Write the proportion equation
   2,820.84 : 3,890.37 = 2,114.34 : x
2. Step 2: Convert to fraction form
   2,820.84/3,890.37 = 2,114.34/x
3. Step 3: Cross multiply
   2,820.84x = 3,890.37 × 2,114.34
4. Step 4: Simplify right side
   2,820.84x = 8,225,564.91
5. Step 5: Solve for x
   x = 8,225,564.91/2,820.84
6. Step 6: Final answer
   x = 2,916.00