Finding the Third Proportional to 12,408.19 and 13,683.94

Step by Step Solution

1. Step 1: Write the proportion equation
   12,408.19 : 13,683.94 = 13,683.94 : x
2. Step 2: Convert to fraction form
   12,408.19/13,683.94 = 13,683.94/x
3. Step 3: Cross multiply
   12,408.19x = 13,683.94 × 13,683.94
4. Step 4: Simplify right side
   12,408.19x = 187,250,145.50
5. Step 5: Solve for x
   x = 187,250,145.50/12,408.19
6. Step 6: Final answer
   x = 15,090.85