Finding the Third Proportional to 7,620.19 and 12,168.56

Step by Step Solution

1. Step 1: Write the proportion equation
   7,620.19 : 12,168.56 = 12,168.56 : x
2. Step 2: Convert to fraction form
   7,620.19/12,168.56 = 12,168.56/x
3. Step 3: Cross multiply
   7,620.19x = 12,168.56 × 12,168.56
4. Step 4: Simplify right side
   7,620.19x = 148,073,913.32
5. Step 5: Solve for x
   x = 148,073,913.32/7,620.19
6. Step 6: Final answer
   x = 19,431.79