Finding the Fourth Proportional to 5,667.99, 7,821.25 and 3,311.50

Step by Step Solution

1. Step 1: Write the proportion equation
   5,667.99 : 7,821.25 = 3,311.50 : x
2. Step 2: Convert to fraction form
   5,667.99/7,821.25 = 3,311.50/x
3. Step 3: Cross multiply
   5,667.99x = 7,821.25 × 3,311.50
4. Step 4: Simplify right side
   5,667.99x = 25,900,069.38
5. Step 5: Solve for x
   x = 25,900,069.38/5,667.99
6. Step 6: Final answer
   x = 4,569.53