Finding the Fourth Proportional to 33,109.99, 49,685.54 and 13,388.72

Step by Step Solution

1. Step 1: Write the proportion equation
   33,109.99 : 49,685.54 = 13,388.72 : x
2. Step 2: Convert to fraction form
   33,109.99/49,685.54 = 13,388.72/x
3. Step 3: Cross multiply
   33,109.99x = 49,685.54 × 13,388.72
4. Step 4: Simplify right side
   33,109.99x = 665,225,467.74
5. Step 5: Solve for x
   x = 665,225,467.74/33,109.99
6. Step 6: Final answer
   x = 20,091.38