Finding the Third Proportional to 13,128.75 and 26,713.13

Step by Step Solution

1. Step 1: Write the proportion equation
   13,128.75 : 26,713.13 = 26,713.13 : x
2. Step 2: Convert to fraction form
   13,128.75/26,713.13 = 26,713.13/x
3. Step 3: Cross multiply
   13,128.75x = 26,713.13 × 26,713.13
4. Step 4: Simplify right side
   13,128.75x = 713,591,047.27
5. Step 5: Solve for x
   x = 713,591,047.27/13,128.75
6. Step 6: Final answer
   x = 54,353.31