Finding the Fourth Proportional to 2,900.70, 4,350.71 and 1,255.91

Step by Step Solution

1. Step 1: Write the proportion equation
   2,900.70 : 4,350.71 = 1,255.91 : x
2. Step 2: Convert to fraction form
   2,900.70/4,350.71 = 1,255.91/x
3. Step 3: Cross multiply
   2,900.70x = 4,350.71 × 1,255.91
4. Step 4: Simplify right side
   2,900.70x = 5,464,081.58
5. Step 5: Solve for x
   x = 5,464,081.58/2,900.70
6. Step 6: Final answer
   x = 1,883.71