Finding the Third Proportional to 6,129 and 12,980.50

Step by Step Solution

1. Step 1: Write the proportion equation
   6,129 : 12,980.50 = 12,980.50 : x
2. Step 2: Convert to fraction form
   6,129/12,980.50 = 12,980.50/x
3. Step 3: Cross multiply
   6,129x = 12,980.50 × 12,980.50
4. Step 4: Simplify right side
   6,129x = 168,493,380.25
5. Step 5: Solve for x
   x = 168,493,380.25/6,129
6. Step 6: Final answer
   x = 27,491.17