Finding the Third Proportional to 13,518 and 23,139

Step by Step Solution

1. Step 1: Write the proportion equation
   13,518 : 23,139 = 23,139 : x
2. Step 2: Convert to fraction form
   13,518/23,139 = 23,139/x
3. Step 3: Cross multiply
   13,518x = 23,139 × 23,139
4. Step 4: Simplify right side
   13,518x = 535,413,321
5. Step 5: Solve for x
   x = 535,413,321/13,518
6. Step 6: Final answer
   x = 39,607.44