Finding the Fourth Proportional to 12,443.76, 18,666.72 and 3,679.02

Step by Step Solution

1. Step 1: Write the proportion equation
   12,443.76 : 18,666.72 = 3,679.02 : x
2. Step 2: Convert to fraction form
   12,443.76/18,666.72 = 3,679.02/x
3. Step 3: Cross multiply
   12,443.76x = 18,666.72 × 3,679.02
4. Step 4: Simplify right side
   12,443.76x = 68,675,236.21
5. Step 5: Solve for x
   x = 68,675,236.21/12,443.76
6. Step 6: Final answer
   x = 5,518.85