Finding the Fourth Proportional to 3,913.67, 5,400.72 and 2,319.59

Step by Step Solution

1. Step 1: Write the proportion equation
   3,913.67 : 5,400.72 = 2,319.59 : x
2. Step 2: Convert to fraction form
   3,913.67/5,400.72 = 2,319.59/x
3. Step 3: Cross multiply
   3,913.67x = 5,400.72 × 2,319.59
4. Step 4: Simplify right side
   3,913.67x = 12,527,429.10
5. Step 5: Solve for x
   x = 12,527,429.10/3,913.67
6. Step 6: Final answer
   x = 3,200.95