Finding the Fourth Proportional to 1,851.58, 2,554.40 and 1,222.96

Step by Step Solution

1. Step 1: Write the proportion equation
   1,851.58 : 2,554.40 = 1,222.96 : x
2. Step 2: Convert to fraction form
   1,851.58/2,554.40 = 1,222.96/x
3. Step 3: Cross multiply
   1,851.58x = 2,554.40 × 1,222.96
4. Step 4: Simplify right side
   1,851.58x = 3,123,929.02
5. Step 5: Solve for x
   x = 3,123,929.02/1,851.58
6. Step 6: Final answer
   x = 1,687.17