Finding the Fourth Proportional to 20,499.37, 28,280.91 and 12,527.75

Step by Step Solution

1. Step 1: Write the proportion equation
   20,499.37 : 28,280.91 = 12,527.75 : x
2. Step 2: Convert to fraction form
   20,499.37/28,280.91 = 12,527.75/x
3. Step 3: Cross multiply
   20,499.37x = 28,280.91 × 12,527.75
4. Step 4: Simplify right side
   20,499.37x = 354,296,287.93
5. Step 5: Solve for x
   x = 354,296,287.93/20,499.37
6. Step 6: Final answer
   x = 17,283.28