Finding the Fourth Proportional to 3,111.85, 4,668.35 and 890.59

Step by Step Solution

1. Step 1: Write the proportion equation
   3,111.85 : 4,668.35 = 890.59 : x
2. Step 2: Convert to fraction form
   3,111.85/4,668.35 = 890.59/x
3. Step 3: Cross multiply
   3,111.85x = 4,668.35 × 890.59
4. Step 4: Simplify right side
   3,111.85x = 4,157,585.83
5. Step 5: Solve for x
   x = 4,157,585.83/3,111.85
6. Step 6: Final answer
   x = 1,336.05