Finding the Fourth Proportional to 12,116.45, 18,172.56 and 3,231.89

Step by Step Solution

1. Step 1: Write the proportion equation
   12,116.45 : 18,172.56 = 3,231.89 : x
2. Step 2: Convert to fraction form
   12,116.45/18,172.56 = 3,231.89/x
3. Step 3: Cross multiply
   12,116.45x = 18,172.56 × 3,231.89
4. Step 4: Simplify right side
   12,116.45x = 58,731,714.94
5. Step 5: Solve for x
   x = 58,731,714.94/12,116.45
6. Step 6: Final answer
   x = 4,847.27