Finding the Fourth Proportional to 36,168.72, 54,264.96 and 12,789.96

Step by Step Solution

1. Step 1: Write the proportion equation
   36,168.72 : 54,264.96 = 12,789.96 : x
2. Step 2: Convert to fraction form
   36,168.72/54,264.96 = 12,789.96/x
3. Step 3: Cross multiply
   36,168.72x = 54,264.96 × 12,789.96
4. Step 4: Simplify right side
   36,168.72x = 694,046,667.80
5. Step 5: Solve for x
   x = 694,046,667.80/36,168.72
6. Step 6: Final answer
   x = 19,189.14