Finding the Fourth Proportional to 3,909.24, 5,394.72 and 2,140.82

Step by Step Solution

1. Step 1: Write the proportion equation
   3,909.24 : 5,394.72 = 2,140.82 : x
2. Step 2: Convert to fraction form
   3,909.24/5,394.72 = 2,140.82/x
3. Step 3: Cross multiply
   3,909.24x = 5,394.72 × 2,140.82
4. Step 4: Simplify right side
   3,909.24x = 11,549,124.47
5. Step 5: Solve for x
   x = 11,549,124.47/3,909.24
6. Step 6: Final answer
   x = 2,954.31