Finding the Fourth Proportional to 1,591.71, 2,195.98 and 928.32

Step by Step Solution

1. Step 1: Write the proportion equation
   1,591.71 : 2,195.98 = 928.32 : x
2. Step 2: Convert to fraction form
   1,591.71/2,195.98 = 928.32/x
3. Step 3: Cross multiply
   1,591.71x = 2,195.98 × 928.32
4. Step 4: Simplify right side
   1,591.71x = 2,038,572.15
5. Step 5: Solve for x
   x = 2,038,572.15/1,591.71
6. Step 6: Final answer
   x = 1,280.74