Finding the Fourth Proportional to 2,572.71, 3,857.23 and 1,111.06

Step by Step Solution

1. Step 1: Write the proportion equation
   2,572.71 : 3,857.23 = 1,111.06 : x
2. Step 2: Convert to fraction form
   2,572.71/3,857.23 = 1,111.06/x
3. Step 3: Cross multiply
   2,572.71x = 3,857.23 × 1,111.06
4. Step 4: Simplify right side
   2,572.71x = 4,285,613.96
5. Step 5: Solve for x
   x = 4,285,613.96/2,572.71
6. Step 6: Final answer
   x = 1,665.80