Finding the Fourth Proportional to 2,572.27, 3,859.77 and 1,111.30

Step by Step Solution

1. Step 1: Write the proportion equation
   2,572.27 : 3,859.77 = 1,111.30 : x
2. Step 2: Convert to fraction form
   2,572.27/3,859.77 = 1,111.30/x
3. Step 3: Cross multiply
   2,572.27x = 3,859.77 × 1,111.30
4. Step 4: Simplify right side
   2,572.27x = 4,289,362.40
5. Step 5: Solve for x
   x = 4,289,362.40/2,572.27
6. Step 6: Final answer
   x = 1,667.54