Finding the Third Proportional to 17,780 and 27,890

Step by Step Solution

1. Step 1: Write the proportion equation
   17,780 : 27,890 = 27,890 : x
2. Step 2: Convert to fraction form
   17,780/27,890 = 27,890/x
3. Step 3: Cross multiply
   17,780x = 27,890 × 27,890
4. Step 4: Simplify right side
   17,780x = 777,852,100
5. Step 5: Solve for x
   x = 777,852,100/17,780
6. Step 6: Final answer
   x = 43,748.71