Finding the Fourth Proportional to 1,591.41, 2,196.39 and 928.18

Step by Step Solution

1. Step 1: Write the proportion equation
   1,591.41 : 2,196.39 = 928.18 : x
2. Step 2: Convert to fraction form
   1,591.41/2,196.39 = 928.18/x
3. Step 3: Cross multiply
   1,591.41x = 2,196.39 × 928.18
4. Step 4: Simplify right side
   1,591.41x = 2,038,639.78
5. Step 5: Solve for x
   x = 2,038,639.78/1,591.41
6. Step 6: Final answer
   x = 1,281.03