Finding the Third Proportional to 12,328.88 and 18,420.75

Step by Step Solution

1. Step 1: Write the proportion equation
   12,328.88 : 18,420.75 = 18,420.75 : x
2. Step 2: Convert to fraction form
   12,328.88/18,420.75 = 18,420.75/x
3. Step 3: Cross multiply
   12,328.88x = 18,420.75 × 18,420.75
4. Step 4: Simplify right side
   12,328.88x = 339,324,030.56
5. Step 5: Solve for x
   x = 339,324,030.56/12,328.88
6. Step 6: Final answer
   x = 27,522.71