Finding the Fourth Proportional to 3,854.75, 5,783.78 and 1,222.47

Step by Step Solution

1. Step 1: Write the proportion equation
   3,854.75 : 5,783.78 = 1,222.47 : x
2. Step 2: Convert to fraction form
   3,854.75/5,783.78 = 1,222.47/x
3. Step 3: Cross multiply
   3,854.75x = 5,783.78 × 1,222.47
4. Step 4: Simplify right side
   3,854.75x = 7,070,491.42
5. Step 5: Solve for x
   x = 7,070,491.42/3,854.75
6. Step 6: Final answer
   x = 1,834.23