Finding the Fourth Proportional to 3,817.95, 5,268.72 and 2,139.42

Step by Step Solution

1. Step 1: Write the proportion equation
   3,817.95 : 5,268.72 = 2,139.42 : x
2. Step 2: Convert to fraction form
   3,817.95/5,268.72 = 2,139.42/x
3. Step 3: Cross multiply
   3,817.95x = 5,268.72 × 2,139.42
4. Step 4: Simplify right side
   3,817.95x = 11,272,032.72
5. Step 5: Solve for x
   x = 11,272,032.72/3,817.95
6. Step 6: Final answer
   x = 2,952.38