Finding the Fourth Proportional to 2,209.34, 3,329.89 and 1,904.87

Step by Step Solution

1. Step 1: Write the proportion equation
   2,209.34 : 3,329.89 = 1,904.87 : x
2. Step 2: Convert to fraction form
   2,209.34/3,329.89 = 1,904.87/x
3. Step 3: Cross multiply
   2,209.34x = 3,329.89 × 1,904.87
4. Step 4: Simplify right side
   2,209.34x = 6,343,007.56
5. Step 5: Solve for x
   x = 6,343,007.56/2,209.34
6. Step 6: Final answer
   x = 2,871.00