Finding the Fourth Proportional to 12,118.72, 18,178.10 and 3,353.66

Step by Step Solution

1. Step 1: Write the proportion equation
   12,118.72 : 18,178.10 = 3,353.66 : x
2. Step 2: Convert to fraction form
   12,118.72/18,178.10 = 3,353.66/x
3. Step 3: Cross multiply
   12,118.72x = 18,178.10 × 3,353.66
4. Step 4: Simplify right side
   12,118.72x = 60,963,166.85
5. Step 5: Solve for x
   x = 60,963,166.85/12,118.72
6. Step 6: Final answer
   x = 5,030.50