Finding the Fourth Proportional to 3,817.82, 5,268.56 and 2,139.30

Step by Step Solution

1. Step 1: Write the proportion equation
   3,817.82 : 5,268.56 = 2,139.30 : x
2. Step 2: Convert to fraction form
   3,817.82/5,268.56 = 2,139.30/x
3. Step 3: Cross multiply
   3,817.82x = 5,268.56 × 2,139.30
4. Step 4: Simplify right side
   3,817.82x = 11,271,030.41
5. Step 5: Solve for x
   x = 11,271,030.41/3,817.82
6. Step 6: Final answer
   x = 2,952.22