Finding the Fourth Proportional to 20,086.37, 27,715.93 and 12,531.50

Step by Step Solution

1. Step 1: Write the proportion equation
   20,086.37 : 27,715.93 = 12,531.50 : x
2. Step 2: Convert to fraction form
   20,086.37/27,715.93 = 12,531.50/x
3. Step 3: Cross multiply
   20,086.37x = 27,715.93 × 12,531.50
4. Step 4: Simplify right side
   20,086.37x = 347,322,006.89
5. Step 5: Solve for x
   x = 347,322,006.89/20,086.37
6. Step 6: Final answer
   x = 17,291.43