Finding the Fourth Proportional to 33,279.58, 49,904.79 and 12,488.50

Step by Step Solution

1. Step 1: Write the proportion equation
   33,279.58 : 49,904.79 = 12,488.50 : x
2. Step 2: Convert to fraction form
   33,279.58/49,904.79 = 12,488.50/x
3. Step 3: Cross multiply
   33,279.58x = 49,904.79 × 12,488.50
4. Step 4: Simplify right side
   33,279.58x = 623,235,969.92
5. Step 5: Solve for x
   x = 623,235,969.92/33,279.58
6. Step 6: Final answer
   x = 18,727.28