Finding the Fourth Proportional to 12,155.38, 18,235.12 and 3,835.21

Step by Step Solution

1. Step 1: Write the proportion equation
   12,155.38 : 18,235.12 = 3,835.21 : x
2. Step 2: Convert to fraction form
   12,155.38/18,235.12 = 3,835.21/x
3. Step 3: Cross multiply
   12,155.38x = 18,235.12 × 3,835.21
4. Step 4: Simplify right side
   12,155.38x = 69,935,500.78
5. Step 5: Solve for x
   x = 69,935,500.78/12,155.38
6. Step 6: Final answer
   x = 5,753.46