Finding the Fourth Proportional to 2,159.22, 2,978.82 and 1,274.70

Step by Step Solution

1. Step 1: Write the proportion equation
   2,159.22 : 2,978.82 = 1,274.70 : x
2. Step 2: Convert to fraction form
   2,159.22/2,978.82 = 1,274.70/x
3. Step 3: Cross multiply
   2,159.22x = 2,978.82 × 1,274.70
4. Step 4: Simplify right side
   2,159.22x = 3,797,101.85
5. Step 5: Solve for x
   x = 3,797,101.85/2,159.22
6. Step 6: Final answer
   x = 1,758.55