Finding the Fourth Proportional to 2,076.52, 3,111.54 and 1,668.28

Step by Step Solution

1. Step 1: Write the proportion equation
   2,076.52 : 3,111.54 = 1,668.28 : x
2. Step 2: Convert to fraction form
   2,076.52/3,111.54 = 1,668.28/x
3. Step 3: Cross multiply
   2,076.52x = 3,111.54 × 1,668.28
4. Step 4: Simplify right side
   2,076.52x = 5,190,919.95
5. Step 5: Solve for x
   x = 5,190,919.95/2,076.52
6. Step 6: Final answer
   x = 2,499.82