Finding the Fourth Proportional to 3,477.72, 5,185.56 and 3,091.35

Step by Step Solution

1. Step 1: Write the proportion equation
   3,477.72 : 5,185.56 = 3,091.35 : x
2. Step 2: Convert to fraction form
   3,477.72/5,185.56 = 3,091.35/x
3. Step 3: Cross multiply
   3,477.72x = 5,185.56 × 3,091.35
4. Step 4: Simplify right side
   3,477.72x = 16,030,380.91
5. Step 5: Solve for x
   x = 16,030,380.91/3,477.72
6. Step 6: Final answer
   x = 4,609.45