Finding the Fourth Proportional to 1,591.25, 2,195.91 and 928.26

Step by Step Solution

1. Step 1: Write the proportion equation
   1,591.25 : 2,195.91 = 928.26 : x
2. Step 2: Convert to fraction form
   1,591.25/2,195.91 = 928.26/x
3. Step 3: Cross multiply
   1,591.25x = 2,195.91 × 928.26
4. Step 4: Simplify right side
   1,591.25x = 2,038,375.42
5. Step 5: Solve for x
   x = 2,038,375.42/1,591.25
6. Step 6: Final answer
   x = 1,280.99