Finding the Third Proportional to 6,115.88 and 12,888.56

Step by Step Solution

1. Step 1: Write the proportion equation
   6,115.88 : 12,888.56 = 12,888.56 : x
2. Step 2: Convert to fraction form
   6,115.88/12,888.56 = 12,888.56/x
3. Step 3: Cross multiply
   6,115.88x = 12,888.56 × 12,888.56
4. Step 4: Simplify right side
   6,115.88x = 166,115,043.32
5. Step 5: Solve for x
   x = 166,115,043.32/6,115.88
6. Step 6: Final answer
   x = 27,161.29