Finding the Fourth Proportional to 12,409.10, 18,606.61 and 4,086.86

Step by Step Solution

1. Step 1: Write the proportion equation
   12,409.10 : 18,606.61 = 4,086.86 : x
2. Step 2: Convert to fraction form
   12,409.10/18,606.61 = 4,086.86/x
3. Step 3: Cross multiply
   12,409.10x = 18,606.61 × 4,086.86
4. Step 4: Simplify right side
   12,409.10x = 76,042,522.22
5. Step 5: Solve for x
   x = 76,042,522.22/12,409.10
6. Step 6: Final answer
   x = 6,127.96