Finding the Fourth Proportional to 1,227.83, 1,698.77 and 1,040.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,227.83 : 1,698.77 = 1,040.72 : x
2. Step 2: Convert to fraction form
   1,227.83/1,698.77 = 1,040.72/x
3. Step 3: Cross multiply
   1,227.83x = 1,698.77 × 1,040.72
4. Step 4: Simplify right side
   1,227.83x = 1,767,938.02
5. Step 5: Solve for x
   x = 1,767,938.02/1,227.83
6. Step 6: Final answer
   x = 1,439.89