Finding the Fourth Proportional to 12,043.15, 18,066.66 and 3,721.21

Step by Step Solution

1. Step 1: Write the proportion equation
   12,043.15 : 18,066.66 = 3,721.21 : x
2. Step 2: Convert to fraction form
   12,043.15/18,066.66 = 3,721.21/x
3. Step 3: Cross multiply
   12,043.15x = 18,066.66 × 3,721.21
4. Step 4: Simplify right side
   12,043.15x = 67,229,835.86
5. Step 5: Solve for x
   x = 67,229,835.86/12,043.15
6. Step 6: Final answer
   x = 5,582.41