Finding the Fourth Proportional to 5,540.89, 7,645.88 and 3,865.90

Step by Step Solution

1. Step 1: Write the proportion equation
   5,540.89 : 7,645.88 = 3,865.90 : x
2. Step 2: Convert to fraction form
   5,540.89/7,645.88 = 3,865.90/x
3. Step 3: Cross multiply
   5,540.89x = 7,645.88 × 3,865.90
4. Step 4: Simplify right side
   5,540.89x = 29,558,180.00
5. Step 5: Solve for x
   x = 29,558,180.00/5,540.89
6. Step 6: Final answer
   x = 5,334.56