Finding the Fourth Proportional to 3,111.55, 4,668.12 and 1,886.83

Step by Step Solution

1. Step 1: Write the proportion equation
   3,111.55 : 4,668.12 = 1,886.83 : x
2. Step 2: Convert to fraction form
   3,111.55/4,668.12 = 1,886.83/x
3. Step 3: Cross multiply
   3,111.55x = 4,668.12 × 1,886.83
4. Step 4: Simplify right side
   3,111.55x = 8,807,948.86
5. Step 5: Solve for x
   x = 8,807,948.86/3,111.55
6. Step 6: Final answer
   x = 2,830.73