Finding the Fourth Proportional to 2,566.70, 3,849.90 and 1,085.30

Step by Step Solution

1. Step 1: Write the proportion equation
   2,566.70 : 3,849.90 = 1,085.30 : x
2. Step 2: Convert to fraction form
   2,566.70/3,849.90 = 1,085.30/x
3. Step 3: Cross multiply
   2,566.70x = 3,849.90 × 1,085.30
4. Step 4: Simplify right side
   2,566.70x = 4,178,296.47
5. Step 5: Solve for x
   x = 4,178,296.47/2,566.70
6. Step 6: Final answer
   x = 1,627.89