Finding the Third Proportional to 9,090 and 12,859

Step by Step Solution

1. Step 1: Write the proportion equation
   9,090 : 12,859 = 12,859 : x
2. Step 2: Convert to fraction form
   9,090/12,859 = 12,859/x
3. Step 3: Cross multiply
   9,090x = 12,859 × 12,859
4. Step 4: Simplify right side
   9,090x = 165,353,881
5. Step 5: Solve for x
   x = 165,353,881/9,090
6. Step 6: Final answer
   x = 18,190.75