Finding the Fourth Proportional to 12,662.05, 18,988.40 and 4,339.83

Step by Step Solution

1. Step 1: Write the proportion equation
   12,662.05 : 18,988.40 = 4,339.83 : x
2. Step 2: Convert to fraction form
   12,662.05/18,988.40 = 4,339.83/x
3. Step 3: Cross multiply
   12,662.05x = 18,988.40 × 4,339.83
4. Step 4: Simplify right side
   12,662.05x = 82,406,391.01
5. Step 5: Solve for x
   x = 82,406,391.01/12,662.05
6. Step 6: Final answer
   x = 6,508.14