Finding the Fourth Proportional to 3,690.72, 5,538.50 and 1,960.56

Step by Step Solution

1. Step 1: Write the proportion equation
   3,690.72 : 5,538.50 = 1,960.56 : x
2. Step 2: Convert to fraction form
   3,690.72/5,538.50 = 1,960.56/x
3. Step 3: Cross multiply
   3,690.72x = 5,538.50 × 1,960.56
4. Step 4: Simplify right side
   3,690.72x = 10,858,561.56
5. Step 5: Solve for x
   x = 10,858,561.56/3,690.72
6. Step 6: Final answer
   x = 2,942.13