Finding the Fourth Proportional to 3,411.96, 5,109.30 and 2,109.48

Step by Step Solution

1. Step 1: Write the proportion equation
   3,411.96 : 5,109.30 = 2,109.48 : x
2. Step 2: Convert to fraction form
   3,411.96/5,109.30 = 2,109.48/x
3. Step 3: Cross multiply
   3,411.96x = 5,109.30 × 2,109.48
4. Step 4: Simplify right side
   3,411.96x = 10,777,966.16
5. Step 5: Solve for x
   x = 10,777,966.16/3,411.96
6. Step 6: Final answer
   x = 3,158.88