Finding the Fourth Proportional to 2,857.91, 4,287.38 and 1,010.10

Step by Step Solution

1. Step 1: Write the proportion equation
   2,857.91 : 4,287.38 = 1,010.10 : x
2. Step 2: Convert to fraction form
   2,857.91/4,287.38 = 1,010.10/x
3. Step 3: Cross multiply
   2,857.91x = 4,287.38 × 1,010.10
4. Step 4: Simplify right side
   2,857.91x = 4,330,690.42
5. Step 5: Solve for x
   x = 4,330,690.42/2,857.91
6. Step 6: Final answer
   x = 1,515.33