Finding the Fourth Proportional to 2,081.80, 3,124.52 and 1,158.40

Step by Step Solution

1. Step 1: Write the proportion equation
   2,081.80 : 3,124.52 = 1,158.40 : x
2. Step 2: Convert to fraction form
   2,081.80/3,124.52 = 1,158.40/x
3. Step 3: Cross multiply
   2,081.80x = 3,124.52 × 1,158.40
4. Step 4: Simplify right side
   2,081.80x = 3,619,422.55
5. Step 5: Solve for x
   x = 3,619,422.55/2,081.80
6. Step 6: Final answer
   x = 1,738.61