Finding the Fourth Proportional to 3,607.85, 5,404.89 and 2,142.56

Step by Step Solution

1. Step 1: Write the proportion equation
   3,607.85 : 5,404.89 = 2,142.56 : x
2. Step 2: Convert to fraction form
   3,607.85/5,404.89 = 2,142.56/x
3. Step 3: Cross multiply
   3,607.85x = 5,404.89 × 2,142.56
4. Step 4: Simplify right side
   3,607.85x = 11,580,301.12
5. Step 5: Solve for x
   x = 11,580,301.12/3,607.85
6. Step 6: Final answer
   x = 3,209.75