Finding the Third Proportional to 8,572 and 13,118

Step by Step Solution

1. Step 1: Write the proportion equation
   8,572 : 13,118 = 13,118 : x
2. Step 2: Convert to fraction form
   8,572/13,118 = 13,118/x
3. Step 3: Cross multiply
   8,572x = 13,118 × 13,118
4. Step 4: Simplify right side
   8,572x = 172,081,924
5. Step 5: Solve for x
   x = 172,081,924/8,572
6. Step 6: Final answer
   x = 20,074.89