Finding the Fourth Proportional to 2,928.72, 4,412.83 and 2,420.10

Step by Step Solution

1. Step 1: Write the proportion equation
   2,928.72 : 4,412.83 = 2,420.10 : x
2. Step 2: Convert to fraction form
   2,928.72/4,412.83 = 2,420.10/x
3. Step 3: Cross multiply
   2,928.72x = 4,412.83 × 2,420.10
4. Step 4: Simplify right side
   2,928.72x = 10,679,489.88
5. Step 5: Solve for x
   x = 10,679,489.88/2,928.72
6. Step 6: Final answer
   x = 3,646.47