Finding the Fourth Proportional to 2,899.89, 4,351.86 and 1,257.57

Step by Step Solution

1. Step 1: Write the proportion equation
   2,899.89 : 4,351.86 = 1,257.57 : x
2. Step 2: Convert to fraction form
   2,899.89/4,351.86 = 1,257.57/x
3. Step 3: Cross multiply
   2,899.89x = 4,351.86 × 1,257.57
4. Step 4: Simplify right side
   2,899.89x = 5,472,768.58
5. Step 5: Solve for x
   x = 5,472,768.58/2,899.89
6. Step 6: Final answer
   x = 1,887.23