Finding the Fourth Proportional to 3,855.49, 5,781.51 and 1,222.25

Step by Step Solution

1. Step 1: Write the proportion equation
   3,855.49 : 5,781.51 = 1,222.25 : x
2. Step 2: Convert to fraction form
   3,855.49/5,781.51 = 1,222.25/x
3. Step 3: Cross multiply
   3,855.49x = 5,781.51 × 1,222.25
4. Step 4: Simplify right side
   3,855.49x = 7,066,421.69
5. Step 5: Solve for x
   x = 7,066,421.69/3,855.49
6. Step 6: Final answer
   x = 1,832.82