Finding the Fourth Proportional to 2,158.80, 2,977.91 and 1,274.43

Step by Step Solution

1. Step 1: Write the proportion equation
   2,158.80 : 2,977.91 = 1,274.43 : x
2. Step 2: Convert to fraction form
   2,158.80/2,977.91 = 1,274.43/x
3. Step 3: Cross multiply
   2,158.80x = 2,977.91 × 1,274.43
4. Step 4: Simplify right side
   2,158.80x = 3,795,154.58
5. Step 5: Solve for x
   x = 3,795,154.58/2,158.80
6. Step 6: Final answer
   x = 1,757.99