Finding the Fourth Proportional to 3,723.94, 5,138.74 and 2,045.31

Step by Step Solution

1. Step 1: Write the proportion equation
   3,723.94 : 5,138.74 = 2,045.31 : x
2. Step 2: Convert to fraction form
   3,723.94/5,138.74 = 2,045.31/x
3. Step 3: Cross multiply
   3,723.94x = 5,138.74 × 2,045.31
4. Step 4: Simplify right side
   3,723.94x = 10,510,316.31
5. Step 5: Solve for x
   x = 10,510,316.31/3,723.94
6. Step 6: Final answer
   x = 2,822.36