Finding the Fourth Proportional to 12,085.76, 18,134.03 and 5,423.60

Step by Step Solution

1. Step 1: Write the proportion equation
   12,085.76 : 18,134.03 = 5,423.60 : x
2. Step 2: Convert to fraction form
   12,085.76/18,134.03 = 5,423.60/x
3. Step 3: Cross multiply
   12,085.76x = 18,134.03 × 5,423.60
4. Step 4: Simplify right side
   12,085.76x = 98,351,648.00
5. Step 5: Solve for x
   x = 98,351,648.00/12,085.76
6. Step 6: Final answer
   x = 8,137.82