Finding the Third Proportional to 12,130 and 18,120.50

Step by Step Solution

1. Step 1: Write the proportion equation
   12,130 : 18,120.50 = 18,120.50 : x
2. Step 2: Convert to fraction form
   12,130/18,120.50 = 18,120.50/x
3. Step 3: Cross multiply
   12,130x = 18,120.50 × 18,120.50
4. Step 4: Simplify right side
   12,130x = 328,352,520.25
5. Step 5: Solve for x
   x = 328,352,520.25/12,130
6. Step 6: Final answer
   x = 27,069.46