Finding the Third Proportional to 5,980.78 and 12,918.09

Step by Step Solution

1. Step 1: Write the proportion equation
   5,980.78 : 12,918.09 = 12,918.09 : x
2. Step 2: Convert to fraction form
   5,980.78/12,918.09 = 12,918.09/x
3. Step 3: Cross multiply
   5,980.78x = 12,918.09 × 12,918.09
4. Step 4: Simplify right side
   5,980.78x = 166,877,146.13
5. Step 5: Solve for x
   x = 166,877,146.13/5,980.78
6. Step 6: Final answer
   x = 27,902.23