Finding the Fourth Proportional to 8,085.03, 12,128.76 and 2,890.50

Step by Step Solution

1. Step 1: Write the proportion equation
   8,085.03 : 12,128.76 = 2,890.50 : x
2. Step 2: Convert to fraction form
   8,085.03/12,128.76 = 2,890.50/x
3. Step 3: Cross multiply
   8,085.03x = 12,128.76 × 2,890.50
4. Step 4: Simplify right side
   8,085.03x = 35,058,180.78
5. Step 5: Solve for x
   x = 35,058,180.78/8,085.03
6. Step 6: Final answer
   x = 4,336.18