Finding the Fourth Proportional to 12,665.76, 18,998.61 and 3,305.73

Step by Step Solution

1. Step 1: Write the proportion equation
   12,665.76 : 18,998.61 = 3,305.73 : x
2. Step 2: Convert to fraction form
   12,665.76/18,998.61 = 3,305.73/x
3. Step 3: Cross multiply
   12,665.76x = 18,998.61 × 3,305.73
4. Step 4: Simplify right side
   12,665.76x = 62,804,275.04
5. Step 5: Solve for x
   x = 62,804,275.04/12,665.76
6. Step 6: Final answer
   x = 4,958.59