Finding the Fourth Proportional to 2,572.59, 3,859.57 and 1,112.77

Step by Step Solution

1. Step 1: Write the proportion equation
   2,572.59 : 3,859.57 = 1,112.77 : x
2. Step 2: Convert to fraction form
   2,572.59/3,859.57 = 1,112.77/x
3. Step 3: Cross multiply
   2,572.59x = 3,859.57 × 1,112.77
4. Step 4: Simplify right side
   2,572.59x = 4,294,813.71
5. Step 5: Solve for x
   x = 4,294,813.71/2,572.59
6. Step 6: Final answer
   x = 1,669.45