Finding the Fourth Proportional to 12,884.67, 19,341.72 and 12,155.67

Step by Step Solution

1. Step 1: Write the proportion equation
   12,884.67 : 19,341.72 = 12,155.67 : x
2. Step 2: Convert to fraction form
   12,884.67/19,341.72 = 12,155.67/x
3. Step 3: Cross multiply
   12,884.67x = 19,341.72 × 12,155.67
4. Step 4: Simplify right side
   12,884.67x = 235,111,565.55
5. Step 5: Solve for x
   x = 235,111,565.55/12,884.67
6. Step 6: Final answer
   x = 18,247.39