Finding the Fourth Proportional to 33,078.58, 49,588.71 and 12,287.50

Step by Step Solution

1. Step 1: Write the proportion equation
   33,078.58 : 49,588.71 = 12,287.50 : x
2. Step 2: Convert to fraction form
   33,078.58/49,588.71 = 12,287.50/x
3. Step 3: Cross multiply
   33,078.58x = 49,588.71 × 12,287.50
4. Step 4: Simplify right side
   33,078.58x = 609,321,274.13
5. Step 5: Solve for x
   x = 609,321,274.13/33,078.58
6. Step 6: Final answer
   x = 18,420.42