Finding the Fourth Proportional to 40,386.50, 60,589.56 and 12,684.50

Step by Step Solution

1. Step 1: Write the proportion equation
   40,386.50 : 60,589.56 = 12,684.50 : x
2. Step 2: Convert to fraction form
   40,386.50/60,589.56 = 12,684.50/x
3. Step 3: Cross multiply
   40,386.50x = 60,589.56 × 12,684.50
4. Step 4: Simplify right side
   40,386.50x = 768,548,273.82
5. Step 5: Solve for x
   x = 768,548,273.82/40,386.50
6. Step 6: Final answer
   x = 19,029.83