Finding the Fourth Proportional to 12,662.43, 18,993.69 and 3,897.30

Step by Step Solution

1. Step 1: Write the proportion equation
   12,662.43 : 18,993.69 = 3,897.30 : x
2. Step 2: Convert to fraction form
   12,662.43/18,993.69 = 3,897.30/x
3. Step 3: Cross multiply
   12,662.43x = 18,993.69 × 3,897.30
4. Step 4: Simplify right side
   12,662.43x = 74,024,108.04
5. Step 5: Solve for x
   x = 74,024,108.04/12,662.43
6. Step 6: Final answer
   x = 5,845.96