Finding the Third Proportional to 7,822.50 and 12,007.50

Step by Step Solution

1. Step 1: Write the proportion equation
   7,822.50 : 12,007.50 = 12,007.50 : x
2. Step 2: Convert to fraction form
   7,822.50/12,007.50 = 12,007.50/x
3. Step 3: Cross multiply
   7,822.50x = 12,007.50 × 12,007.50
4. Step 4: Simplify right side
   7,822.50x = 144,180,056.25
5. Step 5: Solve for x
   x = 144,180,056.25/7,822.50
6. Step 6: Final answer
   x = 18,431.45