Finding the Third Proportional to 11,815 and 18,280

Step by Step Solution

1. Step 1: Write the proportion equation
   11,815 : 18,280 = 18,280 : x
2. Step 2: Convert to fraction form
   11,815/18,280 = 18,280/x
3. Step 3: Cross multiply
   11,815x = 18,280 × 18,280
4. Step 4: Simplify right side
   11,815x = 334,158,400
5. Step 5: Solve for x
   x = 334,158,400/11,815
6. Step 6: Final answer
   x = 28,282.56