Finding the Fourth Proportional to 7,308.76, 10,958.78 and 2,928.28

Step by Step Solution

1. Step 1: Write the proportion equation
   7,308.76 : 10,958.78 = 2,928.28 : x
2. Step 2: Convert to fraction form
   7,308.76/10,958.78 = 2,928.28/x
3. Step 3: Cross multiply
   7,308.76x = 10,958.78 × 2,928.28
4. Step 4: Simplify right side
   7,308.76x = 32,090,376.30
5. Step 5: Solve for x
   x = 32,090,376.30/7,308.76
6. Step 6: Final answer
   x = 4,390.67