Finding the Fourth Proportional to 2,928.07, 4,395.20 and 2,861.96

Step by Step Solution

1. Step 1: Write the proportion equation
   2,928.07 : 4,395.20 = 2,861.96 : x
2. Step 2: Convert to fraction form
   2,928.07/4,395.20 = 2,861.96/x
3. Step 3: Cross multiply
   2,928.07x = 4,395.20 × 2,861.96
4. Step 4: Simplify right side
   2,928.07x = 12,578,886.59
5. Step 5: Solve for x
   x = 12,578,886.59/2,928.07
6. Step 6: Final answer
   x = 4,295.97