Finding the Fourth Proportional to 2,780.97, 4,172.00 and 1,050.81

Step by Step Solution

1. Step 1: Write the proportion equation
   2,780.97 : 4,172.00 = 1,050.81 : x
2. Step 2: Convert to fraction form
   2,780.97/4,172.00 = 1,050.81/x
3. Step 3: Cross multiply
   2,780.97x = 4,172.00 × 1,050.81
4. Step 4: Simplify right side
   2,780.97x = 4,383,974.07
5. Step 5: Solve for x
   x = 4,383,974.07/2,780.97
6. Step 6: Final answer
   x = 1,576.42