Finding the Fourth Proportional to 2,043.20, 2,819.60 and 1,111.70

Step by Step Solution

1. Step 1: Write the proportion equation
   2,043.20 : 2,819.60 = 1,111.70 : x
2. Step 2: Convert to fraction form
   2,043.20/2,819.60 = 1,111.70/x
3. Step 3: Cross multiply
   2,043.20x = 2,819.60 × 1,111.70
4. Step 4: Simplify right side
   2,043.20x = 3,134,549.32
5. Step 5: Solve for x
   x = 3,134,549.32/2,043.20
6. Step 6: Final answer
   x = 1,534.14