Finding the Fourth Proportional to 3,905.15, 5,385.27 and 3,581.00

Step by Step Solution

1. Step 1: Write the proportion equation
   3,905.15 : 5,385.27 = 3,581.00 : x
2. Step 2: Convert to fraction form
   3,905.15/5,385.27 = 3,581.00/x
3. Step 3: Cross multiply
   3,905.15x = 5,385.27 × 3,581.00
4. Step 4: Simplify right side
   3,905.15x = 19,284,656.38
5. Step 5: Solve for x
   x = 19,284,656.38/3,905.15
6. Step 6: Final answer
   x = 4,938.26