Finding the Fourth Proportional to 1,851.14, 2,554.35 and 1,222.99

Step by Step Solution

1. Step 1: Write the proportion equation
   1,851.14 : 2,554.35 = 1,222.99 : x
2. Step 2: Convert to fraction form
   1,851.14/2,554.35 = 1,222.99/x
3. Step 3: Cross multiply
   1,851.14x = 2,554.35 × 1,222.99
4. Step 4: Simplify right side
   1,851.14x = 3,123,944.51
5. Step 5: Solve for x
   x = 3,123,944.51/1,851.14
6. Step 6: Final answer
   x = 1,687.58