Finding the Fourth Proportional to 3,818.49, 5,269.61 and 2,139.82

Step by Step Solution

1. Step 1: Write the proportion equation
   3,818.49 : 5,269.61 = 2,139.82 : x
2. Step 2: Convert to fraction form
   3,818.49/5,269.61 = 2,139.82/x
3. Step 3: Cross multiply
   3,818.49x = 5,269.61 × 2,139.82
4. Step 4: Simplify right side
   3,818.49x = 11,275,997.01
5. Step 5: Solve for x
   x = 11,275,997.01/3,818.49
6. Step 6: Final answer
   x = 2,953.00