Finding the Third Proportional to 12,807 and 19,519.50

Step by Step Solution

1. Step 1: Write the proportion equation
   12,807 : 19,519.50 = 19,519.50 : x
2. Step 2: Convert to fraction form
   12,807/19,519.50 = 19,519.50/x
3. Step 3: Cross multiply
   12,807x = 19,519.50 × 19,519.50
4. Step 4: Simplify right side
   12,807x = 381,010,880.25
5. Step 5: Solve for x
   x = 381,010,880.25/12,807
6. Step 6: Final answer
   x = 29,750.21