Finding the Fourth Proportional to 1,591.59, 2,196.41 and 928.51

Step by Step Solution

1. Step 1: Write the proportion equation
   1,591.59 : 2,196.41 = 928.51 : x
2. Step 2: Convert to fraction form
   1,591.59/2,196.41 = 928.51/x
3. Step 3: Cross multiply
   1,591.59x = 2,196.41 × 928.51
4. Step 4: Simplify right side
   1,591.59x = 2,039,388.65
5. Step 5: Solve for x
   x = 2,039,388.65/1,591.59
6. Step 6: Final answer
   x = 1,281.35