Finding the Fourth Proportional to 12,443.83, 18,666.01 and 3,678.75

Step by Step Solution

1. Step 1: Write the proportion equation
   12,443.83 : 18,666.01 = 3,678.75 : x
2. Step 2: Convert to fraction form
   12,443.83/18,666.01 = 3,678.75/x
3. Step 3: Cross multiply
   12,443.83x = 18,666.01 × 3,678.75
4. Step 4: Simplify right side
   12,443.83x = 68,667,584.29
5. Step 5: Solve for x
   x = 68,667,584.29/12,443.83
6. Step 6: Final answer
   x = 5,518.20