Finding the Fourth Proportional to 12,121.86, 18,180.72 and 3,354.72

Step by Step Solution

1. Step 1: Write the proportion equation
   12,121.86 : 18,180.72 = 3,354.72 : x
2. Step 2: Convert to fraction form
   12,121.86/18,180.72 = 3,354.72/x
3. Step 3: Cross multiply
   12,121.86x = 18,180.72 × 3,354.72
4. Step 4: Simplify right side
   12,121.86x = 60,991,225.00
5. Step 5: Solve for x
   x = 60,991,225.00/12,121.86
6. Step 6: Final answer
   x = 5,031.51