Finding the Third Proportional to 12,918 and 26,383.50

Step by Step Solution

1. Step 1: Write the proportion equation
   12,918 : 26,383.50 = 26,383.50 : x
2. Step 2: Convert to fraction form
   12,918/26,383.50 = 26,383.50/x
3. Step 3: Cross multiply
   12,918x = 26,383.50 × 26,383.50
4. Step 4: Simplify right side
   12,918x = 696,089,072.25
5. Step 5: Solve for x
   x = 696,089,072.25/12,918
6. Step 6: Final answer
   x = 53,885.20