Finding the Fourth Proportional to 12,139.05, 18,208.71 and 3,374.67

Step by Step Solution

1. Step 1: Write the proportion equation
   12,139.05 : 18,208.71 = 3,374.67 : x
2. Step 2: Convert to fraction form
   12,139.05/18,208.71 = 3,374.67/x
3. Step 3: Cross multiply
   12,139.05x = 18,208.71 × 3,374.67
4. Step 4: Simplify right side
   12,139.05x = 61,448,387.38
5. Step 5: Solve for x
   x = 61,448,387.38/12,139.05
6. Step 6: Final answer
   x = 5,062.04