Finding the Fourth Proportional to 2,454.21, 3,684.56 and 1,909.89

Step by Step Solution

1. Step 1: Write the proportion equation
   2,454.21 : 3,684.56 = 1,909.89 : x
2. Step 2: Convert to fraction form
   2,454.21/3,684.56 = 1,909.89/x
3. Step 3: Cross multiply
   2,454.21x = 3,684.56 × 1,909.89
4. Step 4: Simplify right side
   2,454.21x = 7,037,094.75
5. Step 5: Solve for x
   x = 7,037,094.75/2,454.21
6. Step 6: Final answer
   x = 2,867.36