Finding the Fourth Proportional to 3,808.89, 5,715.04 and 2,421.86

Step by Step Solution

1. Step 1: Write the proportion equation
   3,808.89 : 5,715.04 = 2,421.86 : x
2. Step 2: Convert to fraction form
   3,808.89/5,715.04 = 2,421.86/x
3. Step 3: Cross multiply
   3,808.89x = 5,715.04 × 2,421.86
4. Step 4: Simplify right side
   3,808.89x = 13,841,035.01
5. Step 5: Solve for x
   x = 13,841,035.01/3,808.89
6. Step 6: Final answer
   x = 3,633.88