Finding the Fourth Proportional to 8,085.98, 12,130.17 and 2,890.64

Step by Step Solution

1. Step 1: Write the proportion equation
   8,085.98 : 12,130.17 = 2,890.64 : x
2. Step 2: Convert to fraction form
   8,085.98/12,130.17 = 2,890.64/x
3. Step 3: Cross multiply
   8,085.98x = 12,130.17 × 2,890.64
4. Step 4: Simplify right side
   8,085.98x = 35,063,954.61
5. Step 5: Solve for x
   x = 35,063,954.61/8,085.98
6. Step 6: Final answer
   x = 4,336.39