Finding the Fourth Proportional to 3,928.08, 5,417.88 and 2,436.72

Step by Step Solution

1. Step 1: Write the proportion equation
   3,928.08 : 5,417.88 = 2,436.72 : x
2. Step 2: Convert to fraction form
   3,928.08/5,417.88 = 2,436.72/x
3. Step 3: Cross multiply
   3,928.08x = 5,417.88 × 2,436.72
4. Step 4: Simplify right side
   3,928.08x = 13,201,856.55
5. Step 5: Solve for x
   x = 13,201,856.55/3,928.08
6. Step 6: Final answer
   x = 3,360.89