Finding the Fourth Proportional to 5,890.43, 8,128.10 and 3,500.50

Step by Step Solution

1. Step 1: Write the proportion equation
   5,890.43 : 8,128.10 = 3,500.50 : x
2. Step 2: Convert to fraction form
   5,890.43/8,128.10 = 3,500.50/x
3. Step 3: Cross multiply
   5,890.43x = 8,128.10 × 3,500.50
4. Step 4: Simplify right side
   5,890.43x = 28,452,402.48
5. Step 5: Solve for x
   x = 28,452,402.48/5,890.43
6. Step 6: Final answer
   x = 4,830.28