Finding the Fourth Proportional to 1,591.76, 2,196.23 and 928.37

Step by Step Solution

1. Step 1: Write the proportion equation
   1,591.76 : 2,196.23 = 928.37 : x
2. Step 2: Convert to fraction form
   1,591.76/2,196.23 = 928.37/x
3. Step 3: Cross multiply
   1,591.76x = 2,196.23 × 928.37
4. Step 4: Simplify right side
   1,591.76x = 2,038,898.42
5. Step 5: Solve for x
   x = 2,038,898.42/1,591.76
6. Step 6: Final answer
   x = 1,280.91