Finding the Fourth Proportional to 2,085.08, 3,128.64 and 1,304.88

Step by Step Solution

1. Step 1: Write the proportion equation
   2,085.08 : 3,128.64 = 1,304.88 : x
2. Step 2: Convert to fraction form
   2,085.08/3,128.64 = 1,304.88/x
3. Step 3: Cross multiply
   2,085.08x = 3,128.64 × 1,304.88
4. Step 4: Simplify right side
   2,085.08x = 4,082,499.76
5. Step 5: Solve for x
   x = 4,082,499.76/2,085.08
6. Step 6: Final answer
   x = 1,957.96