Finding the Fourth Proportional to 1,591.57, 2,196.48 and 928.59

Step by Step Solution

1. Step 1: Write the proportion equation
   1,591.57 : 2,196.48 = 928.59 : x
2. Step 2: Convert to fraction form
   1,591.57/2,196.48 = 928.59/x
3. Step 3: Cross multiply
   1,591.57x = 2,196.48 × 928.59
4. Step 4: Simplify right side
   1,591.57x = 2,039,629.36
5. Step 5: Solve for x
   x = 2,039,629.36/1,591.57
6. Step 6: Final answer
   x = 1,281.52