Finding the Fourth Proportional to 33,099.69, 49,649.10 and 8,139.95

Step by Step Solution

1. Step 1: Write the proportion equation
   33,099.69 : 49,649.10 = 8,139.95 : x
2. Step 2: Convert to fraction form
   33,099.69/49,649.10 = 8,139.95/x
3. Step 3: Cross multiply
   33,099.69x = 49,649.10 × 8,139.95
4. Step 4: Simplify right side
   33,099.69x = 404,141,191.55
5. Step 5: Solve for x
   x = 404,141,191.55/33,099.69
6. Step 6: Final answer
   x = 12,209.82