Finding the Third Proportional to 11,215.13 and 12,845.25

Step by Step Solution

1. Step 1: Write the proportion equation
   11,215.13 : 12,845.25 = 12,845.25 : x
2. Step 2: Convert to fraction form
   11,215.13/12,845.25 = 12,845.25/x
3. Step 3: Cross multiply
   11,215.13x = 12,845.25 × 12,845.25
4. Step 4: Simplify right side
   11,215.13x = 165,000,447.56
5. Step 5: Solve for x
   x = 165,000,447.56/11,215.13
6. Step 6: Final answer
   x = 14,712.31