Finding the Fourth Proportional to 3,596.61, 5,394.81 and 1,931.31

Step by Step Solution

1. Step 1: Write the proportion equation
   3,596.61 : 5,394.81 = 1,931.31 : x
2. Step 2: Convert to fraction form
   3,596.61/5,394.81 = 1,931.31/x
3. Step 3: Cross multiply
   3,596.61x = 5,394.81 × 1,931.31
4. Step 4: Simplify right side
   3,596.61x = 10,419,050.50
5. Step 5: Solve for x
   x = 10,419,050.50/3,596.61
6. Step 6: Final answer
   x = 2,896.91