Finding the Fourth Proportional to 1,591.58, 2,196.86 and 928.73

Step by Step Solution

1. Step 1: Write the proportion equation
   1,591.58 : 2,196.86 = 928.73 : x
2. Step 2: Convert to fraction form
   1,591.58/2,196.86 = 928.73/x
3. Step 3: Cross multiply
   1,591.58x = 2,196.86 × 928.73
4. Step 4: Simplify right side
   1,591.58x = 2,040,290.64
5. Step 5: Solve for x
   x = 2,040,290.64/1,591.58
6. Step 6: Final answer
   x = 1,281.93