Finding the Third Proportional to 12,738.09 and 18,347.77

Step by Step Solution

1. Step 1: Write the proportion equation
   12,738.09 : 18,347.77 = 18,347.77 : x
2. Step 2: Convert to fraction form
   12,738.09/18,347.77 = 18,347.77/x
3. Step 3: Cross multiply
   12,738.09x = 18,347.77 × 18,347.77
4. Step 4: Simplify right side
   12,738.09x = 336,640,503.43
5. Step 5: Solve for x
   x = 336,640,503.43/12,738.09
6. Step 6: Final answer
   x = 26,427.86