Finding the Fourth Proportional to 1,928.75, 2,661.56 and 1,131.96

Step by Step Solution

1. Step 1: Write the proportion equation
   1,928.75 : 2,661.56 = 1,131.96 : x
2. Step 2: Convert to fraction form
   1,928.75/2,661.56 = 1,131.96/x
3. Step 3: Cross multiply
   1,928.75x = 2,661.56 × 1,131.96
4. Step 4: Simplify right side
   1,928.75x = 3,012,766.15
5. Step 5: Solve for x
   x = 3,012,766.15/1,928.75
6. Step 6: Final answer
   x = 1,562.03