Finding the Third Proportional to 7,392.50 and 10,128.75

Step by Step Solution

1. Step 1: Write the proportion equation
   7,392.50 : 10,128.75 = 10,128.75 : x
2. Step 2: Convert to fraction form
   7,392.50/10,128.75 = 10,128.75/x
3. Step 3: Cross multiply
   7,392.50x = 10,128.75 × 10,128.75
4. Step 4: Simplify right side
   7,392.50x = 102,591,576.56
5. Step 5: Solve for x
   x = 102,591,576.56/7,392.50
6. Step 6: Final answer
   x = 13,877.79