Finding the Fourth Proportional to 5,669.52, 7,820.88 and 3,311.28

Step by Step Solution

1. Step 1: Write the proportion equation
   5,669.52 : 7,820.88 = 3,311.28 : x
2. Step 2: Convert to fraction form
   5,669.52/7,820.88 = 3,311.28/x
3. Step 3: Cross multiply
   5,669.52x = 7,820.88 × 3,311.28
4. Step 4: Simplify right side
   5,669.52x = 25,897,123.53
5. Step 5: Solve for x
   x = 25,897,123.53/5,669.52
6. Step 6: Final answer
   x = 4,567.78