Finding the Fourth Proportional to 20,048.94, 27,667.98 and 12,987.63

Step by Step Solution

1. Step 1: Write the proportion equation
   20,048.94 : 27,667.98 = 12,987.63 : x
2. Step 2: Convert to fraction form
   20,048.94/27,667.98 = 12,987.63/x
3. Step 3: Cross multiply
   20,048.94x = 27,667.98 × 12,987.63
4. Step 4: Simplify right side
   20,048.94x = 359,341,487.09
5. Step 5: Solve for x
   x = 359,341,487.09/20,048.94
6. Step 6: Final answer
   x = 17,923.22