Finding the Fourth Proportional to 1,591.93, 2,196.86 and 928.65

Step by Step Solution

1. Step 1: Write the proportion equation
   1,591.93 : 2,196.86 = 928.65 : x
2. Step 2: Convert to fraction form
   1,591.93/2,196.86 = 928.65/x
3. Step 3: Cross multiply
   1,591.93x = 2,196.86 × 928.65
4. Step 4: Simplify right side
   1,591.93x = 2,040,116.68
5. Step 5: Solve for x
   x = 2,040,116.68/1,591.93
6. Step 6: Final answer
   x = 1,281.54