Finding the Fourth Proportional to 2,042.11, 2,818.95 and 1,380.09

Step by Step Solution

1. Step 1: Write the proportion equation
   2,042.11 : 2,818.95 = 1,380.09 : x
2. Step 2: Convert to fraction form
   2,042.11/2,818.95 = 1,380.09/x
3. Step 3: Cross multiply
   2,042.11x = 2,818.95 × 1,380.09
4. Step 4: Simplify right side
   2,042.11x = 3,890,402.01
5. Step 5: Solve for x
   x = 3,890,402.01/2,042.11
6. Step 6: Final answer
   x = 1,905.09