Finding the Third Proportional to 12,811.78 and 28,146.09

Step by Step Solution

1. Step 1: Write the proportion equation
   12,811.78 : 28,146.09 = 28,146.09 : x
2. Step 2: Convert to fraction form
   12,811.78/28,146.09 = 28,146.09/x
3. Step 3: Cross multiply
   12,811.78x = 28,146.09 × 28,146.09
4. Step 4: Simplify right side
   12,811.78x = 792,202,593.38
5. Step 5: Solve for x
   x = 792,202,593.38/12,811.78
6. Step 6: Final answer
   x = 61,833.92