Finding the Fourth Proportional to 3,761.61, 5,608.16 and 3,665.76

Step by Step Solution

1. Step 1: Write the proportion equation
   3,761.61 : 5,608.16 = 3,665.76 : x
2. Step 2: Convert to fraction form
   3,761.61/5,608.16 = 3,665.76/x
3. Step 3: Cross multiply
   3,761.61x = 5,608.16 × 3,665.76
4. Step 4: Simplify right side
   3,761.61x = 20,558,150.27
5. Step 5: Solve for x
   x = 20,558,150.27/3,761.61
6. Step 6: Final answer
   x = 5,465.25