Finding the Fourth Proportional to 2,920.23, 4,359.56 and 2,817.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,920.23 : 4,359.56 = 2,817.72 : x
2. Step 2: Convert to fraction form
   2,920.23/4,359.56 = 2,817.72/x
3. Step 3: Cross multiply
   2,920.23x = 4,359.56 × 2,817.72
4. Step 4: Simplify right side
   2,920.23x = 12,284,019.40
5. Step 5: Solve for x
   x = 12,284,019.40/2,920.23
6. Step 6: Final answer
   x = 4,206.52