Finding the Fourth Proportional to 8,491.42, 12,732.27 and 3,556.90

Step by Step Solution

1. Step 1: Write the proportion equation
   8,491.42 : 12,732.27 = 3,556.90 : x
2. Step 2: Convert to fraction form
   8,491.42/12,732.27 = 3,556.90/x
3. Step 3: Cross multiply
   8,491.42x = 12,732.27 × 3,556.90
4. Step 4: Simplify right side
   8,491.42x = 45,287,411.16
5. Step 5: Solve for x
   x = 45,287,411.16/8,491.42
6. Step 6: Final answer
   x = 5,333.31