Finding the Fourth Proportional to 20,460, 28,234.83 and 12,076.50

Step by Step Solution

1. Step 1: Write the proportion equation
   20,460 : 28,234.83 = 12,076.50 : x
2. Step 2: Convert to fraction form
   20,460/28,234.83 = 12,076.50/x
3. Step 3: Cross multiply
   20,460x = 28,234.83 × 12,076.50
4. Step 4: Simplify right side
   20,460x = 340,977,924.50
5. Step 5: Solve for x
   x = 340,977,924.50/20,460
6. Step 6: Final answer
   x = 16,665.59