Finding the Fourth Proportional to 2,404.84, 3,317.60 and 2,109.20

Step by Step Solution

1. Step 1: Write the proportion equation
   2,404.84 : 3,317.60 = 2,109.20 : x
2. Step 2: Convert to fraction form
   2,404.84/3,317.60 = 2,109.20/x
3. Step 3: Cross multiply
   2,404.84x = 3,317.60 × 2,109.20
4. Step 4: Simplify right side
   2,404.84x = 6,997,481.92
5. Step 5: Solve for x
   x = 6,997,481.92/2,404.84
6. Step 6: Final answer
   x = 2,909.75