Finding the Fourth Proportional to 5,679.45, 8,521.29 and 2,558.52

Step by Step Solution

1. Step 1: Write the proportion equation
   5,679.45 : 8,521.29 = 2,558.52 : x
2. Step 2: Convert to fraction form
   5,679.45/8,521.29 = 2,558.52/x
3. Step 3: Cross multiply
   5,679.45x = 8,521.29 × 2,558.52
4. Step 4: Simplify right side
   5,679.45x = 21,801,890.89
5. Step 5: Solve for x
   x = 21,801,890.89/5,679.45
6. Step 6: Final answer
   x = 3,838.73