Finding the Third Proportional to 12,487.29 and 26,128.83

Step by Step Solution

1. Step 1: Write the proportion equation
   12,487.29 : 26,128.83 = 26,128.83 : x
2. Step 2: Convert to fraction form
   12,487.29/26,128.83 = 26,128.83/x
3. Step 3: Cross multiply
   12,487.29x = 26,128.83 × 26,128.83
4. Step 4: Simplify right side
   12,487.29x = 682,715,659.19
5. Step 5: Solve for x
   x = 682,715,659.19/12,487.29
6. Step 6: Final answer
   x = 54,672.85