Finding the Fourth Proportional to 1,851.41, 2,555.15 and 1,105.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,851.41 : 2,555.15 = 1,105.78 : x
2. Step 2: Convert to fraction form
   1,851.41/2,555.15 = 1,105.78/x
3. Step 3: Cross multiply
   1,851.41x = 2,555.15 × 1,105.78
4. Step 4: Simplify right side
   1,851.41x = 2,825,435.62
5. Step 5: Solve for x
   x = 2,825,435.62/1,851.41
6. Step 6: Final answer
   x = 1,526.10