Finding the Fourth Proportional to 3,909.34, 5,394.89 and 2,116.83

Step by Step Solution

1. Step 1: Write the proportion equation
   3,909.34 : 5,394.89 = 2,116.83 : x
2. Step 2: Convert to fraction form
   3,909.34/5,394.89 = 2,116.83/x
3. Step 3: Cross multiply
   3,909.34x = 5,394.89 × 2,116.83
4. Step 4: Simplify right side
   3,909.34x = 11,420,054.41
5. Step 5: Solve for x
   x = 11,420,054.41/3,909.34
6. Step 6: Final answer
   x = 2,921.23