Finding the Fourth Proportional to 12,654.66, 18,979.83 and 3,418.50

Step by Step Solution

1. Step 1: Write the proportion equation
   12,654.66 : 18,979.83 = 3,418.50 : x
2. Step 2: Convert to fraction form
   12,654.66/18,979.83 = 3,418.50/x
3. Step 3: Cross multiply
   12,654.66x = 18,979.83 × 3,418.50
4. Step 4: Simplify right side
   12,654.66x = 64,882,548.86
5. Step 5: Solve for x
   x = 64,882,548.86/12,654.66
6. Step 6: Final answer
   x = 5,127.17