Finding the Fourth Proportional to 1,851.94, 2,554.56 and 1,222.47

Step by Step Solution

1. Step 1: Write the proportion equation
   1,851.94 : 2,554.56 = 1,222.47 : x
2. Step 2: Convert to fraction form
   1,851.94/2,554.56 = 1,222.47/x
3. Step 3: Cross multiply
   1,851.94x = 2,554.56 × 1,222.47
4. Step 4: Simplify right side
   1,851.94x = 3,122,872.96
5. Step 5: Solve for x
   x = 3,122,872.96/1,851.94
6. Step 6: Final answer
   x = 1,686.27