Finding the Fourth Proportional to 3,111.76, 4,668.18 and 1,380.52

Step by Step Solution

1. Step 1: Write the proportion equation
   3,111.76 : 4,668.18 = 1,380.52 : x
2. Step 2: Convert to fraction form
   3,111.76/4,668.18 = 1,380.52/x
3. Step 3: Cross multiply
   3,111.76x = 4,668.18 × 1,380.52
4. Step 4: Simplify right side
   3,111.76x = 6,444,515.85
5. Step 5: Solve for x
   x = 6,444,515.85/3,111.76
6. Step 6: Final answer
   x = 2,071.02