Finding the Fourth Proportional to 20,131.53, 27,777.04 and 12,173.59

Step by Step Solution

1. Step 1: Write the proportion equation
   20,131.53 : 27,777.04 = 12,173.59 : x
2. Step 2: Convert to fraction form
   20,131.53/27,777.04 = 12,173.59/x
3. Step 3: Cross multiply
   20,131.53x = 27,777.04 × 12,173.59
4. Step 4: Simplify right side
   20,131.53x = 338,146,196.50
5. Step 5: Solve for x
   x = 338,146,196.50/20,131.53
6. Step 6: Final answer
   x = 16,796.85