Finding the Fourth Proportional to 20,496.29, 28,276.52 and 12,942.50

Step by Step Solution

1. Step 1: Write the proportion equation
   20,496.29 : 28,276.52 = 12,942.50 : x
2. Step 2: Convert to fraction form
   20,496.29/28,276.52 = 12,942.50/x
3. Step 3: Cross multiply
   20,496.29x = 28,276.52 × 12,942.50
4. Step 4: Simplify right side
   20,496.29x = 365,968,654.00
5. Step 5: Solve for x
   x = 365,968,654.00/20,496.29
6. Step 6: Final answer
   x = 17,855.37