Finding the Fourth Proportional to 3,355.67, 5,008.95 and 3,111.72

Step by Step Solution

1. Step 1: Write the proportion equation
   3,355.67 : 5,008.95 = 3,111.72 : x
2. Step 2: Convert to fraction form
   3,355.67/5,008.95 = 3,111.72/x
3. Step 3: Cross multiply
   3,355.67x = 5,008.95 × 3,111.72
4. Step 4: Simplify right side
   3,355.67x = 15,586,449.89
5. Step 5: Solve for x
   x = 15,586,449.89/3,355.67
6. Step 6: Final answer
   x = 4,644.82