Finding the Third Proportional to 12,576.50 and 16,130.50

Step by Step Solution

1. Step 1: Write the proportion equation
   12,576.50 : 16,130.50 = 16,130.50 : x
2. Step 2: Convert to fraction form
   12,576.50/16,130.50 = 16,130.50/x
3. Step 3: Cross multiply
   12,576.50x = 16,130.50 × 16,130.50
4. Step 4: Simplify right side
   12,576.50x = 260,193,030.25
5. Step 5: Solve for x
   x = 260,193,030.25/12,576.50
6. Step 6: Final answer
   x = 20,688.83