Finding the Fourth Proportional to 3,755.56, 5,658.69 and 3,111.76

Step by Step Solution

1. Step 1: Write the proportion equation
   3,755.56 : 5,658.69 = 3,111.76 : x
2. Step 2: Convert to fraction form
   3,755.56/5,658.69 = 3,111.76/x
3. Step 3: Cross multiply
   3,755.56x = 5,658.69 × 3,111.76
4. Step 4: Simplify right side
   3,755.56x = 17,608,465.05
5. Step 5: Solve for x
   x = 17,608,465.05/3,755.56
6. Step 6: Final answer
   x = 4,688.64