Finding the Fourth Proportional to 5,257.89, 7,255.32 and 2,899.59

Step by Step Solution

1. Step 1: Write the proportion equation
   5,257.89 : 7,255.32 = 2,899.59 : x
2. Step 2: Convert to fraction form
   5,257.89/7,255.32 = 2,899.59/x
3. Step 3: Cross multiply
   5,257.89x = 7,255.32 × 2,899.59
4. Step 4: Simplify right side
   5,257.89x = 21,037,453.32
5. Step 5: Solve for x
   x = 21,037,453.32/5,257.89
6. Step 6: Final answer
   x = 4,001.12