Finding the Fourth Proportional to 12,443.52, 18,666.63 and 3,678.45

Step by Step Solution

1. Step 1: Write the proportion equation
   12,443.52 : 18,666.63 = 3,678.45 : x
2. Step 2: Convert to fraction form
   12,443.52/18,666.63 = 3,678.45/x
3. Step 3: Cross multiply
   12,443.52x = 18,666.63 × 3,678.45
4. Step 4: Simplify right side
   12,443.52x = 68,664,265.12
5. Step 5: Solve for x
   x = 68,664,265.12/12,443.52
6. Step 6: Final answer
   x = 5,518.07