Finding the Fourth Proportional to 3,933.56, 5,902.17 and 2,085.55

Step by Step Solution

1. Step 1: Write the proportion equation
   3,933.56 : 5,902.17 = 2,085.55 : x
2. Step 2: Convert to fraction form
   3,933.56/5,902.17 = 2,085.55/x
3. Step 3: Cross multiply
   3,933.56x = 5,902.17 × 2,085.55
4. Step 4: Simplify right side
   3,933.56x = 12,309,248.07
5. Step 5: Solve for x
   x = 12,309,248.07/3,933.56
6. Step 6: Final answer
   x = 3,129.29