Finding the Fourth Proportional to 3,555.52, 5,306.12 and 3,166.72

Step by Step Solution

1. Step 1: Write the proportion equation
   3,555.52 : 5,306.12 = 3,166.72 : x
2. Step 2: Convert to fraction form
   3,555.52/5,306.12 = 3,166.72/x
3. Step 3: Cross multiply
   3,555.52x = 5,306.12 × 3,166.72
4. Step 4: Simplify right side
   3,555.52x = 16,802,996.33
5. Step 5: Solve for x
   x = 16,802,996.33/3,555.52
6. Step 6: Final answer
   x = 4,725.89