Finding the Third Proportional to 12,520 and 18,140

Step by Step Solution

1. Step 1: Write the proportion equation
   12,520 : 18,140 = 18,140 : x
2. Step 2: Convert to fraction form
   12,520/18,140 = 18,140/x
3. Step 3: Cross multiply
   12,520x = 18,140 × 18,140
4. Step 4: Simplify right side
   12,520x = 329,059,600
5. Step 5: Solve for x
   x = 329,059,600/12,520
6. Step 6: Final answer
   x = 26,282.72