Finding the Fourth Proportional to 3,759.72, 5,643.09 and 1,912.16

Step by Step Solution

1. Step 1: Write the proportion equation
   3,759.72 : 5,643.09 = 1,912.16 : x
2. Step 2: Convert to fraction form
   3,759.72/5,643.09 = 1,912.16/x
3. Step 3: Cross multiply
   3,759.72x = 5,643.09 × 1,912.16
4. Step 4: Simplify right side
   3,759.72x = 10,790,462.76
5. Step 5: Solve for x
   x = 10,790,462.76/3,759.72
6. Step 6: Final answer
   x = 2,870.02