Finding the Fourth Proportional to 8,557.50, 12,842.01 and 3,085.50

Step by Step Solution

1. Step 1: Write the proportion equation
   8,557.50 : 12,842.01 = 3,085.50 : x
2. Step 2: Convert to fraction form
   8,557.50/12,842.01 = 3,085.50/x
3. Step 3: Cross multiply
   8,557.50x = 12,842.01 × 3,085.50
4. Step 4: Simplify right side
   8,557.50x = 39,624,021.86
5. Step 5: Solve for x
   x = 39,624,021.86/8,557.50
6. Step 6: Final answer
   x = 4,630.33