Finding the Third Proportional to 12,818 and 27,890

Step by Step Solution

1. Step 1: Write the proportion equation
   12,818 : 27,890 = 27,890 : x
2. Step 2: Convert to fraction form
   12,818/27,890 = 27,890/x
3. Step 3: Cross multiply
   12,818x = 27,890 × 27,890
4. Step 4: Simplify right side
   12,818x = 777,852,100
5. Step 5: Solve for x
   x = 777,852,100/12,818
6. Step 6: Final answer
   x = 60,684.36