Finding the Third Proportional to 12,936.90 and 26,699.63

Step by Step Solution

1. Step 1: Write the proportion equation
   12,936.90 : 26,699.63 = 26,699.63 : x
2. Step 2: Convert to fraction form
   12,936.90/26,699.63 = 26,699.63/x
3. Step 3: Cross multiply
   12,936.90x = 26,699.63 × 26,699.63
4. Step 4: Simplify right side
   12,936.90x = 712,869,975.14
5. Step 5: Solve for x
   x = 712,869,975.14/12,936.90
6. Step 6: Final answer
   x = 55,103.61