Finding the Fourth Proportional to 2,752.12, 4,129.39 and 1,111.87

Step by Step Solution

1. Step 1: Write the proportion equation
   2,752.12 : 4,129.39 = 1,111.87 : x
2. Step 2: Convert to fraction form
   2,752.12/4,129.39 = 1,111.87/x
3. Step 3: Cross multiply
   2,752.12x = 4,129.39 × 1,111.87
4. Step 4: Simplify right side
   2,752.12x = 4,591,344.86
5. Step 5: Solve for x
   x = 4,591,344.86/2,752.12
6. Step 6: Final answer
   x = 1,668.29