Finding the Fourth Proportional to 3,061.20, 4,589.75 and 1,113.15

Step by Step Solution

1. Step 1: Write the proportion equation
   3,061.20 : 4,589.75 = 1,113.15 : x
2. Step 2: Convert to fraction form
   3,061.20/4,589.75 = 1,113.15/x
3. Step 3: Cross multiply
   3,061.20x = 4,589.75 × 1,113.15
4. Step 4: Simplify right side
   3,061.20x = 5,109,074.65
5. Step 5: Solve for x
   x = 5,109,074.65/3,061.20
6. Step 6: Final answer
   x = 1,668.98