Finding the Third Proportional to 12,128.34 and 18,117.84

Step by Step Solution

1. Step 1: Write the proportion equation
   12,128.34 : 18,117.84 = 18,117.84 : x
2. Step 2: Convert to fraction form
   12,128.34/18,117.84 = 18,117.84/x
3. Step 3: Cross multiply
   12,128.34x = 18,117.84 × 18,117.84
4. Step 4: Simplify right side
   12,128.34x = 328,256,262.15
5. Step 5: Solve for x
   x = 328,256,262.15/12,128.34
6. Step 6: Final answer
   x = 27,065.22