Finding the Fourth Proportional to 33,442.50, 50,166.18 and 12,666

Step by Step Solution

1. Step 1: Write the proportion equation
   33,442.50 : 50,166.18 = 12,666 : x
2. Step 2: Convert to fraction form
   33,442.50/50,166.18 = 12,666/x
3. Step 3: Cross multiply
   33,442.50x = 50,166.18 × 12,666
4. Step 4: Simplify right side
   33,442.50x = 635,404,835.88
5. Step 5: Solve for x
   x = 635,404,835.88/33,442.50
6. Step 6: Final answer
   x = 18,999.92