Finding the Fourth Proportional to 12,085.72, 16,664.80 and 7,603.99

Step by Step Solution

1. Step 1: Write the proportion equation
   12,085.72 : 16,664.80 = 7,603.99 : x
2. Step 2: Convert to fraction form
   12,085.72/16,664.80 = 7,603.99/x
3. Step 3: Cross multiply
   12,085.72x = 16,664.80 × 7,603.99
4. Step 4: Simplify right side
   12,085.72x = 126,718,972.55
5. Step 5: Solve for x
   x = 126,718,972.55/12,085.72
6. Step 6: Final answer
   x = 10,485.02