Finding the Third Proportional to 7,123.50 and 10,221.75

Step by Step Solution

1. Step 1: Write the proportion equation
   7,123.50 : 10,221.75 = 10,221.75 : x
2. Step 2: Convert to fraction form
   7,123.50/10,221.75 = 10,221.75/x
3. Step 3: Cross multiply
   7,123.50x = 10,221.75 × 10,221.75
4. Step 4: Simplify right side
   7,123.50x = 104,484,173.06
5. Step 5: Solve for x
   x = 104,484,173.06/7,123.50
6. Step 6: Final answer
   x = 14,667.53