Finding the Fourth Proportional to 2,287.80, 3,423.60 and 1,591.20

Step by Step Solution

1. Step 1: Write the proportion equation
   2,287.80 : 3,423.60 = 1,591.20 : x
2. Step 2: Convert to fraction form
   2,287.80/3,423.60 = 1,591.20/x
3. Step 3: Cross multiply
   2,287.80x = 3,423.60 × 1,591.20
4. Step 4: Simplify right side
   2,287.80x = 5,447,632.32
5. Step 5: Solve for x
   x = 5,447,632.32/2,287.80
6. Step 6: Final answer
   x = 2,381.17