Finding the Third Proportional to 7,188.75 and 10,921.50

Step by Step Solution

1. Step 1: Write the proportion equation
   7,188.75 : 10,921.50 = 10,921.50 : x
2. Step 2: Convert to fraction form
   7,188.75/10,921.50 = 10,921.50/x
3. Step 3: Cross multiply
   7,188.75x = 10,921.50 × 10,921.50
4. Step 4: Simplify right side
   7,188.75x = 119,279,162.25
5. Step 5: Solve for x
   x = 119,279,162.25/7,188.75
6. Step 6: Final answer
   x = 16,592.48